Durgo 50mm air admittance valve for internal drainage & discharge pipes. SVD2

Durgo 50mm / 56mm air admittance valve for internal drainage & discharge pipes.

This is a genuine Durgo branded item – beware of poor imitations.

Part number: SVD2.

The internal diameter is 56mm, height is 96mm and top diameter is 85mm.

Durgo valves are activated once waste water is sent to the waste pipe. As the pipe fills with negative pressure, the valve will open and allow air into the pipe. Once the pressure is equalised, the valve will close, which is what prevents unwanted smells from escaping and entering the home.