Choosing press jaws for metal-plastic pipes pros and cons of each type

Every detail matters when it comes to insulating and heating your home. A vital consideration that is frequently disregarded is the selection of press jaws for metal-plastic pipes. These instruments are essential to maintaining the longevity and effectiveness of your plumbing system. With so many varieties on the market, it’s critical to weigh the advantages and disadvantages of each in order to make an informed choice.

Because of their strength and adaptability, metal-plastic pipes are frequently utilized in both residential and commercial plumbing systems. These pipes are securely crimped with press jaws to form leak-proof connections. But not every press jaw is made equally. The performance and lifespan of your plumbing system can be considerably impacted by the distinct benefits and disadvantages that each type has to offer.

The standard jaw is one kind of press jaw that is frequently utilized. These jaws are adaptable and work with a variety of metal-plastic pipe diameters. They are a well-liked option for both professionals and homeowners because of their versatility and ease of use. But standard jaws might not be precise enough for specialized projects, and their one-size-fits-all design might not produce the best results in all situations.

Conversely, some jaws are made specifically for a particular pipe size or material. With their improved precision and tighter seal, these jaws lessen the chance of leaks over time. They are perfect for tasks like complex plumbing installations or repairs, where precision is critical. Specialty jaws, however, might be more expensive and might not be as versatile as regular jaws.

Press Jaw Type Pros and Cons
Standard Press Jaws Pros: Widely available and compatible with most metal-plastic pipes. Cons: May not provide the tightest seal compared to specialized jaws.
Geometric Press Jaws Pros: Designed for specific pipe shapes, ensuring a precise fit. Cons: Limited compatibility with other pipe types.

The principle of crimping technology

As previously mentioned, fittings—special connecting elements—are typically used to complete the connection of metal-plastic pipe products.

Although the structural makeup of these components varies, they all consist of a main component that fits into the pipe cavity and a crimp ring, also known as a sleeve, that sits on top of the pipe and crimps it directly.

By using a crimp fitting, you can achieve a tight and dependable joint without the need for additional sealing components. Because connections are made without the need of intricate technical equipment, you can handle the problem of how to crimp metal-plastic pipes on your own, save money, and shorten the time it takes to complete the task at hand.

Advantages and disadvantages of crimping

In contrast, crimping metal-plastic and other kinds of pipes enables you to create an unbreakable connection.

  • simplicity and ease of installation. No special knowledge or skills are required to make the joint. The work can be carried out even by non-professional assemblers;
  • joint strength. The use of crimp press fitting allows you to achieve a joint that is not exposed to high pressure, pressure drops, external mechanical impact;
  • versatility. With the help of crimping method it is possible to connect pipes for construction of various pipelines. This method is also suitable for heating pipes, for , and for gas supply;
  • long service life. If the work of assembling the pipeline is done correctly, this type of connection can last up to 10 – 15 years.

It should be mentioned, though, that there are drawbacks to assembling a pipeline with crimp fittings. These drawbacks include:

  • obtaining an unbreakable connection. This means that in case of any problems, such as leaks, it is impossible to repair the butt joint. To eliminate the fault, a complete replacement of a certain part of the pipe system will be required;
  • impossibility to eliminate defects after the work has been done. If in the course of crimping there was a shift of pipes or the ring crimped not completely, the secondary crimping is not allowed. Eliminate the lack of tightness can only replace the fitting and repeat the work;
  • The need for special equipment – press jaws – which is used to crimp (press) the fitting.

Press jaws are relatively expensive. However, the required tools can be rented for one-time use in a household setting.


Experts utilize a common scheme to arrange tools according to the kind of drive:

  • manual – the simplest and lightest in weight tool designed for simple household tasks;
  • Hydraulic – operate on the basis of a hydraulic cylinder that creates force by transferring pressure from a smaller cylinder to a larger one;
  • electric – operate from the mains or battery, are characterized by maximum performance compared to other types of device.
Types Features Advantages Disadvantages
Manual Compact product consisting of a metal crimping head and two handles. Equipped with several interchangeable nozzles for pipes of different diameters. Lightness in work (average weight of the tool – 2.5 kg) and versatility in the performance of simple one-time tasks (for example, to repair a small section of the water supply system in the house). limitation on the diameter of crimped pipes – up to 20 mm.
Hydraulic Equipped with a hydropress, which is connected to the working head. When the handles are brought together, the piston enters the hydraulic cylinder and creates a force that is transmitted to the crimping head. Suitable for pipes with a diameter of 50-100 mm. Simple conversion of human physical effort into hydraulic effort, which means that muscle power is practically unnecessary, ensures productivity. High price and need for regular maintenance.
Electric Powered by mains or battery. Reliable devices that allow you to connect pipes up to 110 mm and more. Ability to use the tool for large-scale utility installation projects. Impressive size, preventing their use in tight spaces, as well as high cost.

How to choose a metal pipe press

If you plan to purchase a model for frequent use in working with pipelines, you should give preference to universal tools, that is, those modifications that can serve the widest range of work. By the way, for use in the home is quite suitable device that works with formats 10-16 mm. Larger diameters should still be serviced by experienced specialists. If pliers are chosen for pressing metal-plastic pipes forming responsible lines of main networks, then here it is worth thinking about the feasibility of buying a hand tool as such. Perhaps the best solution in this situation is a mains or cordless unit. But, on the other hand, the complete autonomy of manual modifications in the work on remote de-energized objects is also a significant plus, and this should be taken into account.

All pros and cons of using pressing equipment

The information provided makes it abundantly evident that presses are required for metal-plastic pipes. It is impossible to connect the MF line and press coupling without them.

When installing faucets, pulling through the heating network, or setting up warm floors, they come in very handy. It’s time to list all the advantages and disadvantages of this connection strategy.

  1. The press connection is permanent and does not require constant tightening and inspection.Connection of metal-plastic pipes with fittings by means of presses allows to install the main line in concrete screed, and any other concealed types of installation.The connection made with press tongs easily works under pressure up to ten bars.Press connections are characterized by mechanical strength and durability. They can stand for more than 50 years.Uncomplicated installation performed by presses is not labor intensive and is done in a short time.

However, the connections, which require pressing machinery, also have certain drawbacks. Among them are:

  1. the system becomes non-disassembling, and mistakes at installation of press joints are fraught with subsequent cutting of pipes and installation of a new fitting; the cost of presses for many home masters is significant, so among this category of craftsmen this toolkit does not enjoy wide popularity.


Customers like the Valtec manual press jaws for metal-plastic pipes. Since its launch in 2002, this Italian-Russian company has gained recognition for the dependability and high caliber of its goods.

This is a radial product used for mechanically crimping press fittings in pipe systems of copper, stainless steel thin-walled pipes, polymers, and metal-polymers. The crimping force is determined by the telescopic handles’ length, and its adjustment is accomplished by the pressing head’s 360-degree rotation with respect to the handles. Without accessories, the weight of the Valtec press jaws for metal-plastic pipes is 3.1 kg. Nozzles with TH profiles are part of the standard equipment, and they are necessary for installing press fittings with diameters of 16, 20, 26, and 32 mm.


All presses that have a jaw mount that is compatible and a constant axial crimping force of 32 to 34 kN can use the metal pipe press jaws made by Rothenberger.

The accurate installation and extended lifespan of the press connections are guaranteed by the high strength of the pliers and the accuracy of the product profile for the particular fitting manufacturer. You can use Rothenberger pliers on other presses from different manufacturers.

Type / press jaws Press fitting system Execution Color code
M Mapress and others. 12 – 54 mm red
SV Viega profipress etc. 12 – 54 mm white
TH Henco etc. 14 – 40 mm blue
R Roth et al. 14 – 32 mm yellow
G Geberit etc. 16 – 40 mm black
U Uponor etc. 16 – 50 mm purple
F Frankische etc. 16 – 32 mm brown
VP Viega sanfix etc. 14 – 32 mm blue
HA Oventrop etc. 16 – 40 mm gray


Fora hand press jaws are designed to ensure dependable sealing of pipe elements and fittings in metal-plastic pipes. Pressing sleeves of fittings up to 32 mm in diameter requires radial units.

Regarding the variations in Fora pressing apparatus, we can differentiate:

  1. Extendable telescopic handles 350-650 mm long: with the longest handle extension, the crimping force is almost doubled.
  2. Pressing tongs rotate together with the fixing module by 360 °.

The advice of experts is to purchase press jaws for metal-plastic pipes from authorized dealers; if this isn’t feasible, go to a specialty store. You will obtain a certain level of assurance regarding the equipment’s dependability and functionality in this manner.

As a general rule, pressing metal plastic pipes is not that hard if you use the appropriate pressing jaws. You can obtain a trustworthy pipeline and complete this task with your own hands.

You are now capable of selecting the appropriate press jaws for metal-plastic pipes.

What you should pay attention to

Prior to anything else, confirm that the pliers can crimp the necessary pipe diameter. You can crimp bushing sleeves of fittings with smaller sizes because many models come with interchangeable dies.

Preference should be given to a tool that has extra settings that let you manage and streamline the workflow. Among them are the ensuing systems:

  • ARS – allows you to control the crimping process, not allowing the pliers to open until crimping is finished;
  • OPS – increases mechanical force through the use of stepped clamps
  • APS – provides uniform distribution of force taking into account the diameter of the crimped fitting.

Select pliers manufactured under a well-known brand because, as experience has shown, goods from reputable manufacturers are more dependable. Considering the rise in products that are fake, purchasing equipment from authorized dealers is advised.

If your city does not have any official representatives, you can purchase the tool from specialized online retailers that ship to every city in the Russian Federation.

It should be noted that there is little difference in the price of equipment between Russian cities; for instance, Rems Eco Press pliers are the same price in Khabarovsk, Voronezh, and St. Petersburg.

The nuances of using the tool

Experts point out a number of locations where using press jaws is incredibly inconvenient, including boxes, gutters, beneath false flooring, and suspended ceilings. Using a press gun is advised in these situations.

In places where communication is readily available, the most basic tools can be used.

By using this kind of crimping tool, you can operate the press with one hand and rotate it around the pipe joint’s axis to prevent injuries.

Kindly take note! Press jaws should only be used once to press the fitting. Exposure on repeated occasions is unacceptable.

Buying equipment specifically for one purpose at home is not always financially feasible. If the metal-plastic pipeline needs to be crimped, you can hire a press or get in touch with a company that specializes in doing this kind of work.

To ensure a high-quality connection, metal-plastic pipe ends must also be meticulously cleaned. Even though the fitting doesn’t have any threads, it is still preferable to install it by rotating it multiple times.

Avoiding sharp deformations is essential when using hand pliers.

An essential step in crimping metal-plastic pipe is to use press jaws. A large range of models are available from manufacturers for this use. Pipeline operation longevity and efficiency are ensured by well-executed crimping.

Crimping cable terminals

When we’re talking about press pliers, we should also bring up the crimper—a device used to crimp wire lugs. It can be fitted with a kit that consists of a stripper and cable cutter (used for stripping aluminum or copper wires).

PKGu-50 Hexagonal Wiring Pliers

Tools for crimping cable lugs (connectors) come in a variety of forms; the most popular ones are as follows:

  • manual pliers, for example: scotchlock, PKm-240, PKv-70, PKVk-6, PKG-50, PKI, XD-16, XS-06, DG-1, MD-568, etc.д.;
  • universal (PKu-120, PKIu-10);
  • hydraulic (PRg-70);
  • pump hydraulic (PGPO-60).

Each of them is intended to install connectors with varying materials on cables with specific cross sections, guaranteeing a maximum number of contacts. By controlling the pressing force with a setting on the tool, you can reduce the number of unsuccessful operations.

Features of installation and selection of fittings

Cross-linked polyethylene metal-plastic pipes were not intended to be welded or bonded. After a few months, the welds on them will split and separate anyhow. Furthermore, this plastic has poor adhesion and is resistant to solvents, so glue is not needed. For installation, only specialized fittings are acceptable.

Every cut made in metal-plastic pipe should only be made at a 90-degree angle; even small deviations can negatively impact the connection’s quality.

When selecting a press fitting, the crimp ring should be the primary consideration. It ought to be composed of sturdy metal.

This metal surface has seamless stamping that is molded without any seams. Every seam has the potential to fail. It is preferable to minimize or eradicate the likelihood of a pipeline burst resulting in home flooding as soon as possible. In this case, cheapness is definitely not worth pursuing.

Both the ring and the body of the press fitting have markings that indicate its size. The pipe has information similar to this. Everything needs to be in harmony. Once more, you shouldn’t purchase pipes and fittings made of metal and plastic from various manufacturers. This variation typically causes issues during both the installation and operation phases.

After crimping, the pipe shouldn’t be bent next to the final fitting. This may cause needless tension in the relationship. Furthermore, any lateral force applied to the press fitting is unacceptable. The plastic adjacent to the cable might break, but the cable itself won’t be harmed.

Description of crimping variants

There are three ways to crimp insulated and non-insulated lugs; each is depicted in the figure below.

Three methods for crimping

They are indicated in the figure as:

  • A – crimping by local indentation, the teeth of the punch create the necessary level of pressure, directed at one or more places;
  • B – continuous crimping, the cable is placed in a tubular lug and then crimped together. The result is a reliable electrical contact over the entire area of the lug;
  • C – combined method, the above methods are used simultaneously. In addition to continuous crimping, the punch tooth produces additional pressure at a specific location on the lug.

It should be noted that any crimping technique can guarantee a dependable contact connection provided the prerequisites are satisfied (application technology, appropriate lug or sleeve selection, and a functional working tool). There are many options available on the Russian market from both domestic and foreign producers of tools for crimping electrical cables. Rems, Haupa, and Rothenberger are a few of the well-known international brands that supply Russia with pliers-press for crimping lugs (like NSHVi).

Russian manufacturers of crimping tools are also well-known. These brands include Stoke and KBT, which produce a variety of CTB, CTF, and CTK models in addition to popular press jaw models like PK 16, PKVk 6, and t.д.

As a lug press, PKVk 10 KVT wiring pliers are utilized.

The primary advantage of domestic products over foreign equipment is that they satisfy the standards established by the current GOST for tools of this kind.

Peculiarities of use

Press fittings are special components needed for the crimping method of connecting metal-plastic pipes. These are unique fasteners with a range of designs based on the type of location and pipe diameter. Similar to traditional couplings, press fittings can be used to make bends and branches in the shape of crosses, tees, adapters, and plugs.

Press fittings are made up of a ring and a sleeve that are sealed together in a metal casing and kept apart by a socket and sealing glands. This component can be used to forge a robust connection that is resistant to heavy static and hydraulic loads from the concrete, soil, or medium.

Take note! Press jaws and crimp fittings can be used to join pipes, and this process can be done on a dedicated workbench or right at the pipeline installation locations in the kitchen, bathroom, basement, or other space. Pipe laying in grooves is the only application where the tool is not used because using press jaws there is just inconvenient.

Installation of metal-plastic pipes with compression fittings

Compression fittings are made up of multiple components. A molded body with threads makes up the base. Additionally, there is a coupling nut that clamps the connection and a crimp ring that secures a piece of pipe to the fitting. The sealing ring is a crucial component that guarantees tightness.

The fact that this installation method requires no specialized equipment makes it a good choice. The second benefit is that you can replace the fitting if needed because the connection is collapsible. if it malfunctions or if the pipeline’s configuration needs to be altered. Moreover, it’s very practical.

However, there is a drawback: the threads occasionally leak. It’s easy to fix with a half-twist tuck. But as a result, every connection needs to be open and unobstructed. Additionally, it is stressful to see if it is leaking. It’s not to everyone’s taste.

This is the appearance of compression fittings.

Angles, tees, crosses, and adapters (from one diameter to another) are among the many fittings available. And all of this in various diameters and angles.

The first step in installing metal-plastic pipes on compression fittings is to remove the union nut and crimp ring and make sure the sealing gum is still present. The actual assembly then starts:

  • The nut and ring are put on the pipe.
  • The section is stretched over the fitting until it stops. The stop is indicated by a special small protrusion – a bump.
  • The ring is also tightened until it stops on the fitting. Before tightening the nut
  • The union nut is screwed on. First by hand, the connection of metal-plastic tubes is tightened with two wrenches. One person holds the body of the fitting, the other turns the union nut.

That concludes the compression (screw, threaded) fitting installation process. There’s just one small detail: replace the gaskets right away if you pour antifreeze into the system. With non-freezers, the ones that come with the kit will leak rapidly. Place Teflon or vapor ones. They alone can guarantee tightness. Generally speaking, press fittings are preferable for systems that contain antifreeze. They most definitely don’t leak—if they’re crimped properly.

How to care for the press jaws

The tool needs to be maintained if it is to function dependably for an extended period of time. The metal head of the nozzle needs to be cleaned with a specific solution after use, and the screw and crimping components need to be greased.

The device should be kept dry and packaged in a case or special box that is typically sold with the tool.

Proper storage combined with thorough, high-quality care will ensure that the tool lasts a long time and performs flawlessly.

Units that run on electricity or hydraulics require professional servicing and are more difficult to maintain. You can learn how to maintain them organized from the passport that is fastened to the apparatus.

Crimping sequence for metal-plastic pipes

The crimping method of connecting metal plastic pipe products necessitates precise and cautious execution of all tasks in addition to adherence to safety protocols.

  1. First prepare the pipes for connection. To do this, measure the required length and cut off with special cutters. To make a cut with this tool, it is necessary to spread the handles apart to the maximum distance, and then squeezing movements to make a cut of the pipe. After that, the product is slightly rotated and another cut is made. The actions are repeated until the pipe is completely cut off.
  2. Then the pipe is calibrated. This is necessary due to the fact that in the process of cutting the product takes the shape of an oval. This defect can be eliminated by means of a special calibrator (more details: "How to use a calibrator for metal-plastic pipes with a chamfer – rules and features"). The device is inserted into the pipe cavity and, performing rotational movements, align the pipe ends, giving them a round shape. At the same time, the chamfer is removed from the pipe. Such actions simplify the insertion of the connection fitting into the pipe cavity and prevent damage to the rubber seals.
  3. Next, a crimping sleeve is put on the pipe, which is made in the form of a wide washer and is one of the component parts.
  4. Now the socket, which is the main part of the connecting element, is inserted into the pipe. All rubber gaskets and the O-ring must be checked before installation. The last element is necessary not only for sealing, but also to prevent contact between the metal connector and the metal mesh of the pipe, as a result of which corrosion centers may form.
  5. After complete preparation of the connection point, it is possible to proceed to the crimping process. The work is performed by means of a special press for crimping metal-plastic pipes, which can be of the electric or mechanical type. Electric tools are used only by masters of specialized organizations. In domestic conditions it is recommended to use a more common tool – mechanical press jaws (read: ""). Crimping is performed in the following way: the tool handles are pulled apart to 1800, the crimping head is opened and special sleeves are inserted into it, which are selected according to the pipe diameter. Next, the tool is placed on top of the coupling and, connecting the handles, conduct its crimping of plastic pipes and fittings. To remove and retract the pliers, it is sufficient to pull the handles apart again.

The tightness and strength of the connection are the outcomes of the actions carried out. This easy technique, which connects pipes that should be concealed and have no protrusions, is truly universal. Because they come in various shapes and configurations, fittings for connections of the same type can be used to solve a variety of issues.

Tool application

Metal-plastic pipes are connected using one of two types of fittings:

This kind joins pipes with a threaded connection (compression) by compressing them together with the aid of a split ring that has a nut screwed onto it. The primary drawback of this kind of connection is that the crimp becomes less tight with time. Consequently, in order to stop leaks during operation, the tightening nut must be periodically tightened;

Fitting for compression

Press fittings, or crimps, are made up of a body with a socket, sealing and insulating rings, and a crimping sleeve. These fittings offer a more dependable connection, are easier to install, but require crimping (crimping) pliers to operate.

Crimp fittings

Experts claim that crimp fitting connections are more dependable and long-lasting than other installation techniques. The following benefits come from using press fittings:

  • concealed laying of pipes is allowed, up to their pouring with concrete mortar;
  • connection does not need to be monitored and maintained during operation;
  • This type of connection can be used in systems where the pressure does not exceed 10bar;
  • installation does not take much time and does not cause difficulties;
  • the service life of the joint is at least half a century.

Useful tips

If the length of the pipes is known, a small percentage of plumbing stores provide crimping pipes with fittings as a service for their patrons. You can rent the tool in other stores for a small fee. To complete the entire list of tasks, special skills are not required.

Furthermore, you can save costs by reaching a consensus with multiple knowledgeable experts regarding the purchase of a crimping tool. The household budget will be partially spared with this strategy. In this instance, the tool will be accessible to all in the event of such a necessity.

Peculiarities of using press jaws

Press jaws are a very useful tool, but there are situations where using one is extremely inconvenient. Experts in the repair and installation industry advise using a press gun rather than pliers when working with grooves that are hidden beneath suspended ceilings or false walls. It eliminates all potential for harm and allows for one-handed operation.

A press gun is a contemporary, useful instrument that lets you crimp pipe material in tight spaces and awkward locations. But, it is pricey, and purchasing it for one-time home projects is not reasonable.

Furthermore, the device has the ability to be rotated around the pipes’ joint axis, providing a precise, consistent, and trustworthy pressing.

Example of water supply system wiring

Make the plumbing plan first. You can do this by noting the required fittings on a piece of paper.

Please be aware that installing taps requires a fitting with a threaded end. From heating radiators to sanitary and domestic appliances, taps are required on the branches.

This allows appliances to be disconnected without bringing the system to a complete stop. Depending on the kind of tap being used, the thread type and size can be chosen.

An illustration of a water supply system using plastic and metal pipes

Additionally, depending on the type of system, transition fittings for heating or water are required both before and after the meter. After creating a thorough plan, label each section with its dimensions. To determine how much and what you need, use this drawing. Fittings can be bought strictly based on the list, and it’s best to have some extra pipe on hand. First, you might have measured incorrectly; second, if you’re inexperienced, you could ruin a piece by cutting off too much or crimping it incorrectly, and t.ο.

Agree on the possibility of an exchange

When purchasing everything you require, make a deal with the vendor so that you may exchange or return some fittings if needed. Even experts frequently make mistakes when using them; this is especially true for those who choose to perform plumbing or heating from metal plastic on their own. The fittings can be readily replaced, but the remaining pipe will never be taken back. But you should save the receipt just in case.

Utilizing manifolds is more practical in some situations. They let you connect multiple customers at once. Plumbing and heating manifolds are available (when installing underfloor heating)

When and how to start work

After you arrive home, arrange the fixtures and get started. While metal-plastic pipe installation can be done right away in the summer, it must wait for all the components to warm up to room temperature in the winter, which can take up to 12 hours. Cutting one piece of pipe to the necessary length at a time is preferable. Although it is a little longer, you won’t be confused this way. Additional steps based on the type of fittings chosen.

Only press fittings are used for the metal-plastic pipe heating distribution system.

The pipeline is examined once the metal-plastic pipe installation is finished. To ensure that it is a water supply, simply turn on the faucet at the inlet. It ought to be completed smoothly and gradually. Water will start to fill the system right away. Everything you’ve done is correct if there are no leaks. If any connections leak, they should be tightened if crimp connectors were used for the assembly, or redone if press fittings were used.

Before starting up, a heating system made of metal-plastic pipes needs to be tested under higher pressure by adding cold water to the system. A heating test run could be conducted if the test was successful.

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Choosing a tool

Pliers for crimping fittings are typically classified into the following categories based on the design elements:

Mechanical (manual)

This kind is easily used even by those without specialized knowledge thanks to its straightforward design. Its limited performance makes it primarily a "home" tool for installing pipelines in homes.

Henco mechanical pliers with radial grip

[relatedYouTubeVideos max="3″] is a video on the subject.


This kind of tool is categorized as professional. Instead of using muscle power to create the crimping force, it uses a hydraulic press. Purchasing these pliers makes sense if you need to crimp a lot of press fittings, but keep in mind that they are much more expensive than mechanical tools.

Tools for hydraulic klauke

Electromechanical tools

Pressing pliers of this type are considered professional tools and are rarely used in homes.

Electromechanical, or electric, pliers

It is important to consider that purchasing professional equipment for plumbing work around the house is not a wise decision when selecting a tool. For the task, a mechanical press will work.

When purchasing a tool for professional use, electromechanical equipment is undoubtedly the better choice.

Choosing the best press

You must be aware of the maximum diameter of the metalplastic products before selecting a press to use with them. Examine the data sheet for the tool to learn about all of its features. A set of inserts on crimping pliers makes it possible to crimp MF pipes with smaller cross sections.

Prior to purchasing, be sure to examine the integrated work control and optimization systems:

  1. OPS. It is a system of stepped clamps, which optimizes and increases the applied force.
  2. APS. In this case, the load on the sleeve during pressing will be properly distributed. This system makes work easier, as the amount of effort applied is entirely dependent on the size of the fitting.
  3. APC. If there is such a system, the crimping process will not be completed until the entire sleeve is pressed. This system controls the creation of a quality connection itself.

A lot of products for manual pressing are made to crimp pipelines with a cross-sectional diameter of up to 2.6 cm. You can work with pipes up to 3.2 in diameter with stronger mechanical and hydraulic manual models.

The devices made by German and Belgian manufacturers are the priciest, but budget-friendly and highly productive presses can be found in Turkey or Italy.


The tool appears simple on the outside, but it takes significant resources to fabricate and develop. Not all businesses can afford it. The brands ROTHENBERGER, REMS, and Valtec are particularly well-known for their high-quality metal-plastic pipe presses in the Russian market. ROTHENBERGER is a manufacturer of a large variety of pressure presses and related equipment for pipeline operations.

Products under the REMS brand stand out for their superior construction and premium materials that go into making them. The Valtec press for metal-plastic pipes, which is mostly offered in radial models, is equally impressive. This plumbing unit is essentially all-purpose as it can handle copper, stainless steel, cast iron, and metal-plastic pipes. Another requirement is that the tool in each instance must have performance characteristics appropriate for carrying out a particular task.

Tool with electrohydraulics

Pipe presses that are electrohydraulic in nature are lightweight, highly efficient, and simple to operate. Products with a cross-section up to 110 millimeters can be crimped using them.

Electrohydraulic presses can be classified as follows based on the type of power supply:

  • grid-connected;
  • cordless;
  • universal.

Expert instruments can be battery-operated and fitted with an electric drive.

Universal models can function in both modes; battery models run on an internal battery, while grid models run on the standard electrical grid. Only universal detachable press heads, intended for distinct metal-plastic pipe cross sections, are used with electrohydraulic pliers.

Kindly take note! The battery-operated tool can perform between 50 and 100 crimps in a single charging cycle. These kinds of press jaws enable more efficient operation by distributing the load uniformly over the joint’s entire surface.

This explains why the final joints are of such high quality.

These kinds of pressing pliers make it possible to work more smoothly and distribute the load uniformly over the joint’s entire surface. This explains why the connections were of such high quality.

Main characteristics of the tool

The main working characteristic is considered to be the diameter with which the tool can service pipes

It is crucial to remember that when making a decision, it is insufficient to focus just on the upper bar’s maximum measurement—32 mm, for instance. The key is that every version addresses a particular range of sizes.

Because of this, some press jaws are limited to operating within the 12 to 24 mm diameter range. On the other hand, more potent models that can cover the 16–32 mm spectrum can be found

Furthermore, it is crucial to consider the properties of the press head rotation for user-friendliness. There are some exceptions to the rule that most contemporary models offer 360° torsion.

You should consider the weight of the device as well, particularly if you plan to use it frequently. Press jaws typically weigh 6–8 kg. The amount of energy saved during working actions increases with decreasing weight.

Pressing with manual equipment

Using manual pliers to press is not difficult; the key is to be alert and cautious during the process. An empty, level surface is necessary for the operation so that you can arrange the equipment and the pipe section.

Certain requirements must be met for the connections to function properly, and they proved to be of excellent quality: a large, level surface and adequate lighting. An inexperienced craftsman can place the fitting even if the workspace is convenient.

Following preparation, set the pressing tongs on the table and extend the handles 180 degrees to the sides. Remove the top cage element from the apparatus and replace it with the pressing insert portion that fits the pipe cross-section size. The tool should be snapped into place after the lower half is inserted into the empty lower section of the cage.

A fitting with pliers can only be crimped once. Because it is against the law to process twice, each step must be taken responsibly.

After being assembled into a joint assembly, the pipe and fitting are inserted into the tongs. Ensuring that the fitting sleeve is positioned inside the press liner is imperative.

To ensure a tight crimp, use nozzles that are clearly the same diameter as the pipe cross-section. If not, the gadget will distort the fitting, necessitating a new product replacement.

The handles are brought together to the stop and crimped once the set of pipe and fitting has been correctly inserted into the apparatus. There should be two distinct, easily observable arc-shaped bends on the metal as well as two circular bands. The end product should be a strong, unambiguous fixed fitting that is nearly impossible to remove with makeshift tools.

Fitting installation requires focused attention to detail. Allowing displacements, even of 5 mm, can have detrimental effects on the system as a whole in the future.

The presence of a visible gap greater than 1 mm between the pipe and the nut, a loose and wobbling nut, and a loosely tightened nut can all be indicators that the work was done incorrectly. If mistakes are discovered, the fitting will need to be removed from the pipeline and replaced with a new one.

Choosing the appropriate press jaws for metal-plastic pipes is an important choice that will have a big impact on heating and insulating your house. There are advantages and disadvantages to each type of press jaw that impact things like performance overall, durability, and ease of installation. For homeowners looking to maximize the performance of their heating systems, understanding these distinctions is crucial. People can make decisions that fit their budget and unique needs by researching the benefits and drawbacks of each type. Whether affordability, dependability, or simplicity of installation are your top priorities, this post will hopefully give homeowners useful information to help them make an informed decision when selecting press jaws for metal-plastic pipes.

How to choose a press jaw for connecting metal plastic

Any kind of press jaw—manual, electric, or hydraulic—can be selected based on the amount and difficulty of the task at hand.

It makes sense to use a manual crimping tool for one-time, simple tasks. Select less expensive manual crimping pliers if you are replacing the heating pipes in a private residence. They’ll assist you in completing the task at hand, t.к. For in-home systems, pipes bigger than 20 mm are typically not utilized. In the context of sporadic or one-time tasks, purchasing hydraulic or electric tools is not justified.

It is advised to select tools with hydraulic or electric drive for locksmiths with professional experience or for individual users who undertake a lot of engineering installation work. They have the ability to shorten the performers’ time and effort while also quickening the connection process.

Additionally, there are general guidelines for selecting the right tools:

  • It is best to buy it in a specialty store or a dealer representing a popular brand;
  • If there is a large amount of work to be done, it is better to look for the possibility of renting a tool to make sure it is worth buying your own;
  • When choosing a manufacturer, it is advisable to focus on foreign brands from Europe or the USA.

Crucial! Any tool requires maintenance and usage guidelines that must be followed. For instance, it is not advisable to use hydraulic or electric press jaws in environments with high air humidity.

This may result in jamming.

Pressing tools for metal plastic pipes

A hydraulic pump serves as the primary component of a press tool, also known as a presser. In order to properly test pipes for pressure, this part sets the pressure value. Two categories of press tools exist:

  1. Manual presser. This tool is used mainly for small-scale work and in areas where there is no access to power supply. Manual tool requires some effort to press, which is a disadvantage in the use of this type of device;
  2. Electric tool. This tool is used for large volumes of work. It is characterized by a number of advantages: easy to operate, reliable and durable.

Using a press tool, install metal plastic pipes according to this procedure:

The manual press tool is primarily utilized in remote locations and for small-scale tasks without access to electricity.

  1. Preparation and inspection of the fitting and pipe. The metal plastic part must be cut at right angles. The edges of the end piece must be cleaned with a calibrator and the chamfer on the inside of the pipe must be removed.
  2. The socket (pipe with threaded connection) should be checked for several parameters, having previously lubricated it with soap solution or silicone grease.
  3. Check whether the socket is correctly seated. If the gasket rings are not in the intended grooves, it is necessary to remove the sleeve with an ordinary screwdriver. Then correctly install the rings and put the sleeve back on by making a few light blows with a hammer on the socket.
  4. Connect the fitting socket with the crimper, in this case, if the manual tool is used, it is necessary to bend the "jaws" of the device and connect it with the sleeve in such a way that the special recess in the nozzle, which has a manual crimper, came into contact with the limiting edge. This can be traced through a special window in the sleeve.
  5. The crimper must be at right angles to the axis of the fitting sleeve. The pressing process is carried out until the "jaws" of the tool are completely closed. It is important to take into account that the operation of the electric device is 2 minutes, and rest – at least 8 minutes.

The pressing process is required for pipeline installation, emergency repairs of specific sections, seasonal inspections, and the installation of water supply and heating systems. You can detect different types of errors in system installation by using a specialized tool called a press tool for metal-plastic products.

Preparation of pipes for processing with press jaws

The pipe material needs to be ready for use right before the press jaws are used and the crimping operation is completed.

At both ends of the part, a tiny overlap (2–3 cm) must be added when marking the metal-plastic pipe material. If not, the piece will be shorter than expected based on the estimate after the fitting is inserted. It is not possible to adjust the incorrectly installed press fitting’s position. The entire piece will need to be cut out and replaced with a new one.

This is a mandatory sequence of actions that applies to all types of tools.

  1. Using a tape measure, measure the required amount of pipe material from the coil and make a mark with a marker where the intended cut will be made.
  2. Using scissors for cutting metal-plastic cut off the part of the required length, making sure that the resulting edge was as smooth as possible and made a clear right angle with the conditional central axis of the product.
  3. When using a guillotine tool, its lower edge is kept strictly parallel to the pipe surface, only slightly pressing the cutting part into the pliable material.
  4. When the trimming is done, the resulting end edges are processed with a calibrator. He corrects and equalizes the shape of the cut and carefully removes the internal chamfer.
  5. From the fitting remove the crimp sleeve and put on the edge of the pipe. The connector is inserted directly inside the cut piece.
  6. The end parts of the joint elements are pressed tightly together, and the joint area is insulated with a sealing gasket. It protects the material from corrosion and ensures the tightness of the whole system.
  7. Control of the pipe placement in the sleeve is carried out through a round cutout on the edge zone.

Press jaws are used to perform the crimping operation after the necessary preliminary preparations have been finished.

Conditions of pipe installation and pressure testing

Pipes made of polypropylene and metal-plastic are installed using fittings, which are specialized tools.

When performing installation work, the following guidelines should be followed:

  1. Installation of metal plastic parts, unlike polypropylene pipes, the connection of which should be carried out at a temperature not lower than +5°C, is usually performed at a temperature not lower than +10°C;
  2. When pressing, defects (concavity or breakage) must not be allowed to occur. If they are present, the pipe section should be replaced;
  3. Tensile stress must be avoided when laying the pipes;
  4. The open ends of the parts should be closed with special plugs to avoid the ingress of debris or dirt;
  5. Pouring of the concrete floor covering is carried out after testing, and the pressure should be equal to 0.3 MPa.

A well-executed installation and polypropylene components can extend the system’s lifespan to more than fifty years.

For pressing, the following supplies and instruments are used:

  • cutter or pipe cutter;
  • a calibrator for cleaning and aligning the end edge;
  • press fittings of the required diameter;
  • Press tool (manual or electrically driven).

There are a few things to take into account when choosing press jaws for metal-plastic pipes. There are benefits and drawbacks associated with each type of press jaw that can significantly affect your choice.

First and foremost, it’s critical to determine whether the press jaws are compatible with the particular metal-plastic pipes you have. To achieve a safe and reliable connection, make sure the press jaws are appropriate for your pipes, as not all of them are the same.

Second, think about how user-friendly and effective each kind of press jaw is. Some might provide simpler and faster installation procedures, which could ultimately save you time and effort. But keep in mind that this convenience might cost more, so compare the advantages to your spending plan.

Durability is another important consideration when making decisions. Selecting press jaws composed of premium materials can guarantee durability and dependability, lowering the possibility of future malfunctions or replacements.

Furthermore, safety concerns must be taken into account when selecting press jaws for metal-plastic pipes. By choosing reliable brands and making sure that industry standards are followed, homeowners can reduce the chance of mishaps or leaks and feel more at ease.

The ideal set of press jaws for your metal-plastic pipes will ultimately rely on your personal preferences, needs, and financial constraints. You can make an informed choice that satisfies your needs and guarantees your home’s efficient heating and insulation by carefully weighing the advantages and disadvantages of each type and taking into account elements like compatibility, efficiency, durability, and safety.

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Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

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