In order to avoid risks in the operation of the washing machine, all the details must be taken into account when installing it. As a protection against the effect of water being drawn back into the tank, which often happens, a check valve is installed for the washing machine. In this article, we will tell you in detail about the types of check valve (anti-siphon), about the function and how to install it.
Varieties and functions of the check valve
Dirty water can enter the tank if the washing machine is not properly connected to the sewer. This has negative consequences: laundry deteriorates, a large amount of electricity is consumed. The anti-siphon prevents waste water from flowing back into the washing machine tub and thus protects the drain system from contamination.
The device provides an unobstructed drainage of water from the washing machine. Thanks to a special flap, water from the sewer system does not seep back into the tank. Having an idea of the types of valves and their manufacturers, you can choose a really high-quality drain with an anti-siphon. The following types of check valves can be found in the markets today:
- mortise;
- washing;
- wall-mounted;
- non-separable;
- segment;
All of them perform the function of ensuring the correct drainage of water and are practically the same. However, when installing a washing machine of a certain brand (for example, LG), a segment valve may be required, which can be easily disassembled and cleaned of various debris. A non-separable device is suitable if there is no hard water in the water supply. But even in this case, within 2-3 years, it will need to be replaced.
The wall valve is expensive. This option is used to install drain lines in a narrow gap between the back of the washing machine and the wall. This compact antisiphon has an aesthetic appearance.
When connecting a direct drain to a sewer pipe, the best option would be to install a mortise device. The non-return valve is inserted into a specially prepared insert. The washing antisiphon is designed for installation in any kind of sink siphons.
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Which check valves do the experts recommend?
- Valve made of polypropylene of wall type, production - Czech Republic, firm "Alcaplast". Quality device, affordable, suitable for any drain hoses. It is used as an end attachment with a sewer pipe, it provides a reliable drainage of waste water from the washing machine. Chrome plated anti-siphon with spring mechanism and reflector that decorates the attachment point. The approximate cost is $ 8.
- A check valve made of polypropylene of a cut-in type, made in Italy, the firm "Siroflex". The mechanism is installed in the hole in the sewer pipe or serves as a fastener for the drain hose. The device is represented by a stainless steel spring and a rubber membrane. Provides effective protection for the drain system.The approximate cost is $ 7.
- Segment polypropylene antisiphon, production - Italy, firm "Merloni". This check valve is mounted under the sink. It is easily disassembled and cleaned in case of contamination. The mechanism is a spring with a rubber diaphragm. Provides normal drainage of the water flow from the tank. The approximate cost is $ 8.5.
The principle of operation of the anti-siphon valve
The check valve is a common mechanism and it works in a simple way. A pipe of a certain shape, with a spring or ball valve, is installed on a sewer pipe, a siphon or a drain hose. During draining, water under pressure enters the antisiphon and flows out through it into the sewer pipe. In the event of a back pressure, water will not leak, as the mechanism does not open inside.
When using a spring-loaded valve, a spring and a rubber diaphragm, which creates a damper, protect the drainage system from seepage of dirty water. In a ball check valve, a rubber ball acts as a plug. It is pressed against the membrane under the influence of pressure. With the help of built-in ribs, the ball is cleaned.
Anti-siphon installation
The check valve can be installed by hand. But it is necessary to take into account all its design features. Despite the distinctive details, in any case, the work is done according to the same principle.
The antisiphon consists of a tube with two outlets (from opposite ends) of various diameters. On the one hand, the valve tube must be connected to a siphon or mounted in a cutout in the sewer pipe, and on the other, it must be connected to the drain hose of the washing machine. Then you need to properly seal all the joints with your own hands with a sealant, after which the work can be considered finished.
For normal operation of the washing machine, an antisiphon is not always required. Experts say that the installation of this mechanism is relevant in the case of:
- direct connection of the washing machine to the drain pipe, which is cut very low and there is no way to lift it;
- connecting the drain hose to the siphon located under the sink.
An anti-siphon device is not necessary if the washing machine is connected in accordance with all the rules and the drain pipe is raised to the required height.
However, it reeks of an unpleasant odor from the washing machine, and at the same time the washed things remain dirty after washing, it is necessary to purchase an anti-siphon, the installation of which can be done by hand. In such a situation, there is no alternative solution to the problem!
Summing up, it should be noted that the organization of the drainage of waste water from the tank of the washing machine must be carried out in accordance with all the rules. If a "siphon effect" occurs, an anti-siphon mechanism must be installed. Despite its simple design, the device is irreplaceable when dirty water seeps back into the device. Some washing machines are sold with check valves. But the device can also be purchased separately.
It is very important to choose the type of anti-siphon that will match the drainage device. In addition, you should seriously approach the installation work - it is necessary to reliably seal all parts so that there are no leaks.
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