sewerage system is designed to timely drain waste using the toilet. One of the necessary elements of the system is a non-return valve to a sewer pipe - it is structurally similar to a conventional check valve for water, but functions slightly differently. Installation on the sewer system will help prevent backflow of waste, saving repairs to the apartment in integrity. Installation is carried out in the apartments of apartment buildings, private homes.
check valve Structure: characteristics
a check valve apparatus for sewage consists of several elements:
- Cover - designed to facilitate the operation and maintenance of the structure.
- Lock - holds the valve in position.
- Damper - prevents backflow of the waste pipe.
- Socket - in two variants - the input and output. The first inlet connects to the system, the second - on the exit into the main sewer pipe.
- Ball - used in some models instead of the shutter. It is made of vulcanized rubber material.
- Housing - the shell of the whole structure, which is made of different materials, impeding the deformation and durable to impacts from inside and outside.
The device of modern non-return valve for sewer presented to the details shown. All models can differ from each other form the material production, installation method, and the operating temperature. Some products are designed for outdoor use, while others - for the room and in-house use. Today commercially presented model and a diameter of 50 110 mm.
The principle of operation of the device
eruption of waste water from the toilet is a common accident for the inhabitants of the lower floors in multi-storey buildings. To prevent such a situation, plumbers offer to put the product in the drain. It works like this:
- in the device or mechanism is a ball valve;
- at normal forward flow of water this flap passes water into the tube, providing a drain;
- if there is an emergency situation occurs and the reverse flow of water, the valve is under pressure;
- membrane completely blocks the flow of water into the pipe, and it is not fed back to the toilet;
- design avoids the eruption of sewage from the toilet, thereby protecting the apartment from dangerous situations.
The principle of operation of the ball check valve sewage involves timely maintenance and cleaning of the device. If you do not carry out an audit of the appliance, its functioning deteriorates, and when back flow occurs in the pressure sewer masses can reach the surface of the toilet bowl and be out of it. To clean design is necessary to open the top cover on the body: through it you can gain access to the locking mechanism and clean it from dirt. Installation of the valve is carried out on the joint of two pipes: it may be produced by the horizontal and vertical tube.
Types of sewer valves
In the market of sanitary engineering is represented by a wide variety of non-return valves for sewer system. They differ in the place of installation, installation method, as well as the production of the material.
At the place of application
According to the construction location, check valves are used for street sewage system and on the inside, placed in an apartment. For example, for outdoor use sewer diameter 110, 160 and 200 mm. This big wide pipe into which the product is installed with a manual lock and fuse. Model is set in a horizontal position in the street or in the basement. Inside the unit is equipped with stainless valve.
Valves to be installed inside the apartment can be used in two ways:
- install one unit on a sewer pipe;
- install multiple elements on each sanitary appliance.
The second option will be more expensive, and the first area requires considerable costs for inscribing device in the sewer pipe. Diameter 50 mm is used for mounting on individual devices, and the pipe diameter of 110 mm - when mounted on a common drain pipe.
By way of installation
According to the installation method, inverse sewer valves can be divided into:
- flange;
- flanged;
- coupling.
The first type is installed on the pipeline by means of flange connection. The device is equipped with flanges and special fasteners. The design can be made with a lifting, rotary, ball, or rotating bolt. On three sides there is a plate which must be placed on the bolts to form a flange connection. Often, these models are made of cast iron.
Flanged valves are their small size and low cost. When assembling this type of shutter is fixed between the pipeline flanges. This type can be easily dismantled, parts replacement is quick and without any problems. The internal mechanism of these models presented disc and double Screens.
From the title it is clear that the attachment is represented thread. Part of the production is used stainless steel, cast iron and brass. There are two main types of construction, popularly referred to as "rocker" and "keg".
In material manufacturing
For the production of non-return valves for sewer pipes, use the same materials as for the manufacture of pipes. Designs are:
- Cast iron - used on the trunk sewer systems, often mounted on large diameter pipes. Models can withstand great pressure without deformation.
- Plastic - the most popular type for mounting on inside apartment systems. Affordable and easy to install device.
- Steel - used in outdoor systems, are resistant to corrosion, are not exposed to aggressive environments.
- Bronze - have a long service life and good resistance to external factors. Have a high cost compared to other options.
All the options are of good functioning, but it is necessary to use every kind of purpose.
Criteria for selection of the check valve for sewage
Well, if the selection of the desired valve will be engaged in master plumbing. If the landlord has decided to yourself to find the right design, it is recommended to pay attention to:
- The cross-section of the socket - this figure should match exactly with the section of sewer pipe socket: gaps should not be.
- Material - valve manufacturing raw material should coincide with the raw material pipe production: it is not recommended to mount the valve of plastic on steel pipes.
- Dimensions - to take into account is not only the diameter of the pipe, but also the external dimensions of the valve: it should organically fit into the allotted space.
- Installation - is to choose the type of installation, which is more preferable for the existing pipeline.
- The quality of materials - must be clarified before purchasing the product warranty.
- Cost - the price is not dependent on its external design and functional: the formation of the cost of the manufacturer focuses on the production of the material.
Acquire valves must be verified in shops and retail outlets: domestic manufacturing apparatus of the same quality as foreign embodiments.
Product features installation
Install a check valve on the sewer can be their own hands. Make it simple, most importantly, a number of tools to prepare and follow a phased installation instructions. Tips from the experts to help avoid mistakes.
preparation tools
To produce their own devices to the pipeline installation will require these materials and tools:
- a check valve for drain;
- assembling a knife for cutting the plastic pipes to horizontal or vertical standpipe;
- Building Level valve must be set strictly by regulations;
- different fasteners.
If the manufacturer has not equipped the device mounts, the need to prepare the self-tapping screws, dowels and plastic collars.
Phased installation of the valve
Installation for the outlet valve for constipation against back flow is made in several steps:
- The choice of location. Suitable for mounting the abutment toilet and sewer pipe or the point of contact of the two tubes.
- If the device is mounted in the horizontal mode, it is necessary to set the level. When mounting takes place in the riser duct, the angle of inclination is not important.
- Assembling system takes place in such a way that the sockets directed in the opposite direction of the water current.
- You must use the O-rings and gaskets. You can use glue sealed if desired.
- To set the self-return valve in the drain, avoiding in the future of its vibration, it is recommended to use clamps to fix the unit on the wall or floor.
Installation requires no special skills - it can be done with your hands for 1-2 hours.
Professional advice
To prevent errors during installation and operation, it is necessary to listen to the advice of specialists in sanitary engineering. For example, when mounting the motorized valve is necessary to prepare in advance place and access to nutrition device. Placing the device must be on safety standards.
To lock worked properly before installing it is important to read the instructions and see if there is need for installation in a strictly specified position. Constipation install plastic pipes on the iron is only permitted if the application adapters. If the valve has worn, it is better to completely replace the unit than to find parts for repair of the product, at the risk of the emergence of an extraordinary situation.
Inverse shut-off valves - a necessary element of the sewage system in the apartment and the house. You can install it on their own, it does not take a long time, but the owner of the property will be assured of their safety.