In sewer systems, reverse valves are often used. They differ in parameters, as well as design features. Some devices are suitable for small cottages. Their bandwidth is low. A standard check valve includes two chambers, a holder, a membrane, and a float mechanism.
The plates are installed in different widths and are made of steel or brass. Many models use a screw clamp to securely fix the tube. The first chamber uses a small ball to stabilize the pressure. There is a good check valve (market price) of about 800 rubles.
The principle of the models
The principle of operation of reverse type valves is based on a change in pressure inside the sewer system due to the plates. In the first chamber, water retention and filtration occur. In this case, the masses from the first chamber are not able to return to the pipe. The float mechanism of the device is a stabilizer. With a large volume of wastewater, a membrane is activated. The holder in the device is necessary for fixing it. Wastewater is discharged through a pipe located behind the plates.
Device installation
Clamping rings are often used to install reverse type valves on sewer pipes. Screws are used in various diameters. If we consider pipes at 5.5 cm, then you need two rings. First of all, the inlet pipe of the primary chamber is fixed. Then inspect the float level. All valves are tested before use. Lastly, an outlet pipe is installed. If leaks are detected, the clamping rings change.
Coupling modifications
When the internal water supply and sewerage of buildings are clogged, coupling devices are used. Quite often they are used in apartment buildings. The cases of the models are made only on two cameras. Float mechanisms are standardly used ball type. For sewer systems of 2 bars, the devices are great.
Many models use two steel holders. Outlets are installed in different sizes. For mounting valves of the reverse type, clamping rings with screw connection are used. The tubes are often connected to the primary chamber. The pressure limit of the device depends on the size of the plates.
Single-holder models stand out for their low bandwidth. Their membranes are often clogged. For 3 bar sewer systems, the devices are not suitable. It is also worth noting that the coupling type models are not allowed to be installed in an upright position. There is a good modification in the market of about 860 rubles.
Flange devices
When the internal water supply and sewerage of buildings become clogged, a check valve type is used, which is suitable for pipes of different diameters. The capacity of the models is quite high. Fittings are used both steel and aluminum type. Models with longitudinal holders are quite rare. Many models are great for 3 bar sewer systems. The holders for the modifications are used with and without clamps. Enclosures are standardly manufactured with two cameras.
Convex membrane models are common. Their wastewater capacity is at around 5 microns. Directly float modifications are installed in the primary chamber. Balls are used air type. For many models, the holders are used with a short stand and are fixed. Devices for sewer systems at 2 bars are on the market about 1200 rubles.
Steel Models
Sewer blockages are often cleared thanks to steel valves, which are highly durable. Holders for models are made with different racks. In size, the models are quite different. Many devices are equipped with two clutch mechanisms. The float balls are mainly located in the primary chamber. For sewer systems with 2 bars, the modifications are great.
Fittings with retainers are not installed on all models. Many of them are made with screw fastening. The clamping force of the devices fluctuates around 5.5 N. The outlet pipes are installed on one or more rings. For 3 bar sewer systems, devices with only large protrusions are suitable. The throughput indicator must be at least 4 microns. The stiffness of the nozzles depends on the manufacturer. A standard steel valve on the market costs about 700 rubles.
Cast iron devices
A cast-iron valve (check valve, sewer) is quite common in our time. Many models are manufactured with a coupling device. For horizontal installation on the sewer riser, they fit great. Holders are mainly used with screw connectors. Primary cameras are used in different sizes. Many models are made with holders on short racks.
Membranes are used with clamps and without them. On sewer systems in 3 bars, devices are installed quite often. They are easy to maintain. However, it is important to note that they have low downforce. The price of a good air drain valve ranges around 900 rubles.
Brass Models
In apartment buildings, sewage blockages can be removed using check valves made of brass. The clamping force of devices on average is 7 N. Many models use two fittings. Modifications with extension cords are quite rare. Primary valves are always manufactured with a float. The marginal pressure indicator largely depends on the manufacturer. Clutch modifications are very rare. Not all models are suitable for horizontal installation. Fittings are made both with racks, and without them.
Holders for many models are fixed. To install reverse type valves on the sewer riser, several clamping rings are used. There are many models with adapters on the market. On average, the diameter of the outlet pipe is 6 cm. Holders are often used in the secondary chamber. There is a good valve (check, sewer) in the region of 1200 rubles.
Bronze models
A bronze valve for sewage in a store costs quite a lot. However, it is important to note that it is highly resistant to corrosion. Many models are equipped with choke mechanisms. Double clutch versions are also not uncommon. The average diameter of the outlet pipe is 5.4 cm.
Modifications are fixed only on screw clamps. Holders are often installed in the secondary chamber. The racks below them are pretty wide. The clamping force of devices varies around 5 N. For country houses, models of this type are very rarely acquired. Modifications with two floats are not common. The price of a good model is around 1,400 rubles.
PVC model
The valve (backpressure, sewer) made of polyvinyl chloride is often used in small residential buildings. Racks in many models are used with multiple holders. Float balls are installed in the primary chamber and are quite different in size. Some check valves have two retainers. The outlet pipes are mainly used for large diameters. The wear of this type of valve is extremely low.
For horizontal installation, they are not suitable in the best way. It is especially important to note that there are a lot of fitting modifications on the market. For a large residential building, they fit well. There is an air drain valve made of polyvinyl chloride on average 900 rubles.
Polypropylene Modification
Polypropylene valves are sold only with a sleeve type. Many models are made with an extension cord. If you trust the reviews of experts, then for small houses, devices are great. The central channels are quite different in size. Float devices are most often installed in the primary chamber. On average, the model weighs no more than 2.2 kg. The wear of this type of valve is not very high. Modifications with two membranes are very rare. The limit pressure indicator on the plates, as a rule, does not exceed 4 bar. Many models are made with a wide tubule.
An outlet pipe is located in the secondary chamber. The pressure indicator on the nozzle is not more than 2 bar. For water systems with a large output, these valves are suitable. However, it should be noted that installing them on sewer pipes is allowed only in a horizontal position. The price of a model nowadays ranges around 800 rubles.
EUROPLAST 100 Series Devices
The valve (check, sewer) 110 is made with a coupling device. If you trust the reviews of experts, then the model has a solid holder. The limit pressure indicator is at 4 bar. For sewer systems with a large output, the modification fits well. The float device is located in the primary chamber and does not take up much space.
The clamping force of the device is not more than 8 N. The inlet pipe of the model is not designed for high pressure. The membrane of the reverse type valve is located behind the plates. With large blockages, she copes well. It is also important to note that the valve (return, sewer) is inexpensive, and on the market it can be purchased for 750 rubles.
Model Series EUROPLAST 200
The presented check valve type is made with two chambers. The extension cord in this case is completely made of cast iron. If you trust the reviews of experts, then for sewage systems at 2 bar, the modification is not bad. However, it is important to note that she has problems with the plates. They maintain extreme pressure at around 3 Pa. The clamping force indicator is a maximum of 3 N. The fastening of this valve is screw type.
The output pipe is used with a large diameter, and for residential buildings the model fits well. The inlet pipe is provided by the manufacturer for 3.5 cm. There is only one holder for this check valve type, and it is made entirely of stainless steel. It is also worth noting the fact that the model has a convex membrane. She copes with deposits in large quantities remarkably. The price of the specified reverse type valve fluctuates around 1100 rubles.