Water traps for sewerage. Main varieties

Water traps are an integral part of the plumbing system in every home. They keep pests, hazardous gases, and offensive odors out of our homes by keeping them out of the sewer system. Despite their apparent simplicity, water traps are available in a variety of styles and varieties, each with a distinct function and application in mind for different plumbing situations.

The P-trap, so named because of its distinctive curved shape that resembles the letter "P," is one of the most popular kinds of water traps. This trap is frequently found in bathtubs, showers, and sinks. Gases and smells from the sewer line are prevented from entering the system by a seal created by the water in the P-trap’scurvedshape. It is a popular choice for many homeowners because of its design, which also makes cleaning and maintenance simple.

A different type is the bottle trap, which is smaller in size than the P-trap. It is frequently utilized in small spaces, such as beneath vanity units or tiny sinks. The bottle trap functions similarly to the P-trap by holding water to create a seal against sewer gases. Its shape is similar to a bottle or a "S." Even though it’s smaller, it can still be just as effective and give a sleek appearance to contemporary bathroom designs.

Telescopic and adjustable traps are also available for more specialized uses. These traps can be used in retrofitting older plumbing systems or in unique plumbing setups due to their flexibility in size and configuration. They don’t require major adjustments because they can be adjusted to fit various pipe diameters and angles, guaranteeing a tight and secure seal.

When it comes to maintaining or improving their plumbing systems, homeowners can make more informed decisions if they have a thorough understanding of the various types of water traps and their applications. The effectiveness, safety, and comfort of your living space depend on the water trap you choose, whether you’re building a new house, remodeling an old one, or just fixing a plumbing problem.

Water traps for sewerage play a crucial role in our homes by preventing unpleasant odors and harmful gases from entering living spaces. These traps work by creating a water seal that blocks the passage of these undesirable elements while still allowing wastewater to flow through. There are several main varieties of water traps commonly used in households. The most traditional type is the P-trap, shaped like the letter "P", which is commonly found under sinks and basins. Another type is the bottle trap, which has a more compact design and is often used in spaces where vertical clearance is limited. S-traps are similar to P-traps but have a different shape, resembling the letter "S", and are sometimes used as alternatives. Understanding the different types of water traps can help homeowners choose the most suitable option for their plumbing needs, ensuring a hygienic and efficient sewerage system for their home.

How the hydroseal works?

No matter exactly where the hydraulic seal is placed, it must guard the pipes from severe hydrostroke during flushing in addition to keeping foul smells out of the apartment.

Sewer traps come in a variety of forms and are all composed of sets of pipes with specific shapes that are occasionally enhanced by additional components. Regular use of the plumbing fixtures maintains and replenishes the water column in the trap, guaranteeing the absence of odors.

What siphons are there?

Experts have created a variety of odor trap types to best satisfy the diverse needs of property owners.


The primary external symbol is a distinctive horseshoe-shaped sign. It ensures that the construction is extremely strong, enabling it to sustain high pipe pressure. The elbow hydraulic trap is the most appropriate for outfitting restrooms and toilets with sewage systems.

In the past, cast iron and even bronze were used to make sewer traps. These days, polypropylene is almost always used to make them. It is inexpensive, lightweight, and simple to install. Plastic traps can have multiple components or a single design. When repairs are required, the initial ones are eliminated entirely. If required, the second one can be put together differently and with a different combination of parts to get the intended shape and volume of the conducted water. Lug nuts and clamps allow the system’s component pieces to be securely fastened together.

Sewerage knee gate valves have two bends, one of which is situated 5–6 cm lower than the other. After years of use, the systems are comfortable. They can be easily disassembled and cleaned, either with the use of specialized tools or a flexible cable. The majority of contemporary models come with extra inlets where you can attach hoses from dishwashers or washing machines.


Perfect siphons for kitchen sink sewage systems, which are primarily used for dishwashing. In addition to keeping smells out of the air, certain design elements aid in holding food particles that get stuck in the drain. There are no blockages because they do not enter the main portion of the sewer.

The kind of siphons that are being discussed also include pipes and a waste collection container. The "bottle," as it were. It is reasonably easy to work with in the event that the need arises because it is situated beneath the main pipe.

Without a doubt, the bottle trap is incredibly practical. Its characteristics, however, prevent it from withstanding high water pressure. Consequently, installing such a water trap in the kitchen is the only place it is appropriate. It is not appropriate to use a toilet or bathroom.

It’s time to clean the system when food particles that flushed down the drain overflow the bottle sump and clog the water pipe. It is incredibly easy to make. It is worthwhile to remove the overlay nut holding the container in place, empty the trash, and then screw it back on.


They are odor traps based on their design and principle of operation. They are similar to knee pipes, but they have two bends instead of just one. They are made from pipes that are specifically shaped to prevent blockages while still withstanding extremely high pressure and shock loads. Due to these characteristics, double-turn traps are widely used in industrial settings where it’s critical to continuously discharge large amounts of water. Additionally, the design is completely impervious to leaks. Because of its adjustability, it can be installed in any space—even one that is extremely small.

While bottle traps require less maintenance than two-turn traps, the latter offer a high level of operational reliability that can be crucial in certain situations.


These pipes are made of polypropylene and have a flexible, folded design. This kind of trap has two ends: one connected to the sanitary appliance’s drain and the other to the sewer system’s entrance. Corrugated odor traps work best in small apartments because the tube itself can be bent and arranged in a multitude of ways between these points.

Even the smallest of area rooms can be equipped by positioning the device where it is needed—under the bathtub or sink, for example. This kind of sewer trap is simple to install. One of the drawbacks is the comparatively quick wear and clog formation. They result from the folded surface collecting solid particles—hair, food, soap fragments, etc.—more quickly than the smooth surface. The tube needs to be replaced right away if the owners noticed that it was sagging.

Siphons with overflows

This is a different kind of hydraulic trap for sewerage that gives the sanitary ware an extra drainage hole. It is designed to stop water from the bathtub or sink from spilling onto the floor in the event that the main drain hole stops emptying unexpectedly. When utilizing a trap with an overflow, the overflow hole is connected to an additional pipe, and the trap’s main pipe is mounted as normal.

These kinds of traps are common because they are secure. They do, however, also have a drawback. This is how likely it is that extra water will leak out when taking a shower or doing laundry. Utility bills could result in additional costs for the owner.

Selecting the appropriate model is important if you plan to install a trap with an overflow. Installing the most dependable metal trap is within the reach of those with ample space. Additionally, buying small, flexible plastic models will help those whose homes are small in space.

Choosing the overflow based on the device’s capacity is another crucial detail. The results of using such a trap could even be hazardous if it turns out to be smaller than the bathtub’s required water level. Each siphon’s technical specifications should be easily identified when examining it in the store. Purchasing the wrong part will be a pointless and unpleasant financial waste.

Water Trap Type Description
P-trap A common type that looks like the letter "P". It prevents sewer gases from coming up through the drain.
S-trap Similar to the P-trap but shaped like an "S". It"s used less often now due to potential siphoning issues.
Bottle trap Resembles a bottle and is often used for exposed plumbing situations. It"s compact and can be easily installed.
Shallow Seal Trap Has a shallow water seal and is suitable for low-demand applications. It"s less bulky than other traps.

The sewerage system of any home must include water traps because they are vital in keeping pests, hazardous gases, and offensive odors out of the house. When it comes to updating or maintaining their plumbing systems, homeowners can make more informed decisions if they are aware of the main types of water traps that are available.

The P-trap, so named because of its unique "P" shape, is one of the most popular varieties of water traps. This trap creates a seal that keeps sewer gases from returning up through the drain by using a bend in the pipe to catch a small amount of water. P-traps are very common in bathtubs, showers, and sinks because they are easy to install and work well.

The S-trap, named after its "S" shape, is another well-liked variation. Though it serves a similar purpose as the P-trap, the S-trap is no longer as widely used as it once was because of possible siphoning problems that could cause drainage issues. It is still present in some older homes, though, and with the right installation and upkeep, it can be useful.

Bottle traps are a viable alternative for individuals seeking a contemporary and compact solution. Because of their small size, these traps are frequently used in spaces that are inaccessible to conventional traps, like beneath wall-mounted sinks. Bottle traps work just as well at blocking sewer gases by forming a water seal, despite their smaller size.

Lastly, homeowners can install adjustable traps with greater flexibility because they can change the trap’s height and alignment to fit different plumbing configurations. Because of their adaptability, they are a well-liked option for unique installations or for replacing older traps with only minor plumbing changes.

In conclusion, keeping your home odor-free and healthy depends on selecting the appropriate water trap for your sewerage system. Every type of bottle trap has pros and cons of its own, whether you choose an adjustable, compact, vintage S-trap, classic P-trap, or another. You and your family can have peace of mind knowing that your water trap is still working properly with routine maintenance and sporadic inspections.

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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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