Sewage aerator or vent valve: exploring the features

The sewage system inside one apartment or private house should consist of internal piping, which is created to divert sewage from plumbing fixtures and directs them to the riser. Such a system must necessarily be well ventilated, for which a sewer vent valve or aerator can be used.

What is an air valve

If the house is not organized ventilation of the existing sewage system, then sooner or later from the plumbing equipment will begin to smell slightly drains.

Explain this phenomenon is not difficult:

1. In the process of abundant discharge of sewage, a vacuum appears in the pipes;
2. In order to compensate for the pressure, the system sucks in air from the nearest device, which has the smallest water seal;
3. Water from the water seal is displaced;
4. There is a characteristic sound and the passage for sewer gases opens.

In order to avoid such a situation and to ensure the flow of air into the pipeline, the riser of the system is brought to the roof in the form of a pipe. But in some cases, these measures are not enough, because such a pipe may be installed incorrectly and may freeze through in winter.

Note! There are situations when the output of such a pipe is simply impossible.

A vent valve may be the best solution to these problems. Such an element is a device that conducts air into the sewage system and releases it into the environment.

Note! This device is especially important if an automatic washing machine works in the house, which releases water into the sewer system under pressure, thus creating a strong vacuum.

Valve design

Aeration ventilation valve for sewage is a fairly simple device, which consists of the following elements:

• A housing with a hole in its side to launch air into the system;
• Rubber stem or diaphragm to open and close the hole;
• Gasket made of rubber, ensuring tightness in the process of adjusting the air flow;
• Protective stem-cap that allows inspection of the valve mechanism;
• Seat for reliable fixation on the pipe.

In the modern market, buyers can meet with more than 10 manufacturers of this type of products, whose products may differ significantly in both quality and in such a parameter as price.

Principle of operation

The principle of operation of such a device is quite simple and clear, and at the same time effective.

Air vent for sewage ventilation works as follows:

• In those situations when the pressure in the system is equal to or slightly above atmospheric, the valve is in the closed position;
• The volumetric discharge of fluid causes the occurrence of a jump in such an indicator as pressure;
• The diaphragm or stem releases the passage, providing free air access;
• Air continues to flow into the system until the pressure normalizes;
• The valve closes again.

Advantages of using an air valve

The sewage ventilation valve is not a mandatory element of the system in houses, but its installation has a number of advantages:

• It is a great opportunity to organize sewage systems if it is impossible to bring a funnel to the roof;
• Even if the pipe can still be removed, the valve aerator will save, eliminating roofing and other construction work;
• The lack of output through the roof will prevent the occurrence of roof leaks;
• The possibility of pipe freezing and penetration of cold air into the pipeline is almost completely excluded;
• The aerator eliminates the effect of the chimney, which does not allow the spread of smoke and fire through the pipes;
• The valve increases the efficiency of sewage systems with sewage pipes.

Council Especially effective is the use of a system with an aerator and a funnel in the case of connecting a large number of plumbing fixtures.

Valve mounting

For the installation of the installation of this element does not need to call the experts, with such work any owner can do it himself, following all the steps that the instruction stipulates.

Council You can install the valve on the riser, then it will be enough just one product, or to lead an individual installation for each sanitary device.

Some features of installation

Before taking up work you need to take into account several of the following points:

• The temperature in the room in which the installation is carried out should not fall below zero;
• The aerator, located on the riser, should rise 10-15 cm above the last horizontal outlet;
• In order to prevent the fetid odor from entering the room, the installation must be airtight;
• For simplicity, the processes of repair and monitoring the status of the device should be located in an accessible place;
• When buying a valve, consider its throughput, which measures the number of liters of air passed by the device in 1 second.

Council It is better not to spare money and buy a high-quality aerator with maximum throughput.

Installation procedure

Before installation, it is necessary to turn off the water supply and get to work:

1. First you need to dismantle the pipe., on which it is planned to install the valve;

Note! Dismantling is necessary when installation is carried out on a horizontal pipe; in the case of installation on a riser, an aerator is mounted on its highest point.

1. If you plan to install the device on the pipe that drains the waste water, then you need to choose the right direction for installation. It is important that the arrow on the body of the aerator exactly coincides with the direction of movement of wastewater;
2. Next, the valve is mounted on the pipe using a sealing ring. Installation is carried out in a vertical position in accordance with the instructions to the device. Installation can be carried out directly on the pipe or using a drain or tee sewer.

Finally

The aerator is undoubtedly an important and necessary device for the sewage system, which will allow you to prevent the penetration of unpleasant odors from the drain holes of sanitary appliances directly into the home.

Installing such a device is a simple and straightforward process, so all your costs for arranging the ventilation of the sewage system come down to buying a valve. A video in this article will show how to make installation correctly.