A three -way valve for a warm floor. Device. Principle of operation

Comfort and economy both depend on how well your home is heated, particularly in colder climates. Using a warm floor system, which evenly distributes warmth throughout your living area, is one well-liked approach. The three-way valve, an inventive device that is essential to this system, is crucial for controlling the temperature of your floors. Let’s examine this valve’s operation, construction, and role in maintaining a comfortable home.

Fundamentally, a three-way valve is a control device used to regulate the hot water flow in warm floor systems. In contrast to conventional two-way valves, which only permit or prohibit water flow, the three-way valve offers an additional level of control. By dividing hot water into two distinct routes, it allows you to precisely control the temperature in different areas of your house. Because of its adaptability, every space is guaranteed to have the perfect amount of warmth, maximizing comfort and reducing energy use.

The device itself is made up of a few key parts, such as an actuator, an internal mechanism, and the valve body. Three ports are usually located on the valve body: one for the hot water supply, one for the return flow, and one for directing water to various zones. The actuator, which is frequently thermally or motorized driven, regulates the valve’s position to control the amount of hot water sent to each location. Depending on its particular design, the valve may use an internal ball, disc, or other mechanism to control the flow.

To understand how the three-way valve keeps your home at the ideal temperature, you must understand its basic working principle. Hot water is pumped from the boiler through the supply line and into the valve when the heating system is operating. Here, the water is either circulated back to the boiler for reheating or directed toward the warm floor system based on the actuator of the valve. The actuator balances the heat distribution by varying the position of the valve, guaranteeing that every zone is at the right temperature according to your preferences and the surrounding circumstances.

Component A three-way valve for a warm floor
Device This valve has three ports: one inlet and two outlets. It controls the flow of hot water to the floor heating system.
Principle of operation Depending on how it"s set, the valve can direct hot water to either one circuit of the floor or another, or even mix it to adjust the temperature. It"s like a traffic cop for your heating system.

Principle of operation

The three-way valve is used for shutting off. Installing the supply involves implementing an additional coolant subfusion from the warm floor’s return, which comes from the boiler circuit. As a result, with this kind of installation, you can mix hot coolant from the supply with cooled coolant from the return to reduce the temperature to the level. The thermostatic head sensors that regulate the valve can be:

  • remote;
  • submersible
  • overhead.

Occasionally, a controller-based thermometric servo drive is installed. Typically, manufacturers use arrows to show how the water flow is moving. It is simple to determine the type to which this element belongs for such markers. The arrows indicate the exact mode in which the connection to the contour is made. The installation point ought to be chosen in a way that permits unhindered system adjustment. You should carefully read the manufacturer’s management before installing.

Automation monitors the flow of coolant into the floor circuit. If the temperature becomes higher than the norm, then the passage is blocked by a special plug. When the circuit cools, the stem rises, the coolant circulation begins again. The return should not be lower than 60 degrees, otherwise the load on the boiler will be too large, its resource will be quickly spent. From the feed, the valve selects water and sends it to the return. In standard boilers, the heat exchanger has too low temperature, which contributes to their rapid damage. Condensation boilers of special design are too expensive, it is much more rational to put a three -way valve on traditional boilers.

An impressive illustration of a three-way valve in use:

In this article, we delve into the world of warm floors and explore a crucial component: the three-way valve. This valve is a key player in regulating the temperature of your home"s radiant heating system. Its simple yet ingenious design allows it to control the flow of hot water to different zones of your house with precision. Essentially, it works by directing the flow of water either to the floor heating system, the domestic hot water supply, or a bypass line, depending on the heating requirements. By understanding how this valve operates, homeowners can optimize their heating system for comfort and efficiency, ensuring a cozy and warm living environment while minimizing energy waste.


For warm floors, there are just three varieties of three-way valves. There are some variations in the device and its functionality. Since they nearly look the same from the outside, it’s critical to select the block that will work best for you. You should definitely consider the labeling on the case when making your selection.

The outline of marker "+" has a high temperature. A coolant with a low pace of outflow returns to the coolant. M2 is where two streams converge and mix.

It is important to keep in mind that because the mass valve is composed of ceramic components, contrasting pollution is strictly forbidden. in order for them to not be trustworthy filters.

Types of valves for a warm floor


Two passes are open when the valve is raised. In this instance, the thermal gun’s sensor controls the acquired temperature by mixing actively cold and hot water.

The valve lowers when the coolant temperature rises too high. Thus, the only area that is still free is the knot in the cold coolant. In this instance, the heated floor unit has the interior water preserved.


We note that all of the zones are in different locations in the second iteration of the three-way valve. The warm floor area shifted downward, and Plus shifted from right to left. There’s really no significance to any of these details.

The temperature can be changed by focusing on the markers beneath the rod that is attached to the valve. The process is easy to use and quite dependable. Although this element is cheap, each mode must be manually adjusted. Unequal heating can occur in the heating circuit.

With a thermogol

Most importantly, there is no compliance when the rod is raised. Without any delay, hot water is sent to the floor circuit that is heated. A phenomenon like this has no positive charge and is not productive. The internal circulation continues (as in the first version) if the plug closes.


Thermostatic three-way valves are devices with a dedicated thermostat for warm floors. In this instance, the valve’s movement is automatically adjusted after the initial setting. This process is driven by thermal substance (occasionally gaseous substance). These consistency expand in volume as the temperature rises, which has an impact on the valve. Although it costs more, this kind of equipment is very dependable.

The three-way valve for a warm floor’s location in the third iteration is precisely the same as it was in the first. The coolant enters the heated floor when it is raised, which is the primary distinction. With the second iteration, we noticed a similar phenomenon. As in the first and second cases, there is an active circulation if the valve closes. All three valves are connected in this manner by a closed valve.

The valve can be referred to as follows:

  • No. 1 – mixing
  • No. 2 – dividing
  • No. 3 – dividing

The final two are auxiliary; they only alter the coolant’s direction of movement and require a knife to operate.

After looking at the big picture, it is simple to determine which first valve is best for the warm floor. The explanation is straightforward: the system comes with coolant that has undergone the required testing. It is important to remember that the valves have varying throughputs, operate at different temperatures, and are composed of different materials.

The repercussions of using a warm floor without a subscription are as follows:

The comfort and efficiency of your warm floor system can be greatly increased by installing a three-way valve. By dividing the flow of hot water between several zones, this device maintains ideal temperature control throughout your house. Custom settings in different areas are possible by controlling the heat distribution, which maximizes energy savings and lowers heating expenses.

The device itself is made up of an actuator that regulates the water flow and a valve body with three ports. Installed in a warm floor system, it is an essential part of keeping various rooms or zones at the appropriate temperature. It allows for precise adjustment based on individual heating requirements by directing hot water either to the floor heating system or back to the heat source.

The working principle is quite simple, but it works incredibly well. The valve modulates the hot water flow by opening or closing in response to signals from the thermostat or control system. By ensuring that each zone gets the proper amount of heat, this dynamic control helps to avoid situations where a zone overheats or underheats. The end result is that everyone living there can experience constant warmth and comfort.

To sum up, adding a three-way valve to your warm floor system has a lot of advantages for comfort, economy, and efficiency. It maximizes the heating system’s overall performance by enabling precise temperature control in various zones. In order to achieve the best possible thermal comfort and energy efficiency for your home, this device is a valuable asset whether you’re designing a new installation or retrofitting an existing setup.

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Michael Kuznetsov

I love to create beauty and comfort with my own hands. In my articles I share tips on warming the house and repairing with my own hands.

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