FloPlast AV32 32mm Air Admittance Valve-Compression, White

Product Information

When a soil vent system is not included or can’t be for whatever valid reason, an air admittance valve is then used in its place. In almost all instances they are installed internally. Only those made especially for use outside can be used externally as they need to be weather and frost proof to prevent them freezing up and stopping working, in which case the above issues can occur. As we have looked at above, there are 2 different types of air admittance valve. In the majority of cases the one that you’ll be fitting will be the smaller version to take care of localised pressure issues.

Durgo Valves are used in various scenarios where conventional venting is not possible or practical. They are typically employed in internal plumbing systems where connection to an external vent is difficult, such as in high-rise buildings, basement bathrooms, or in renovations where access is limited. Types of Durgo Valves You can use compression fittings if you wish but they tend to be big and bulky. See our project here on UPVC compression fittings for more help.One final point to mention is that there are 2 different types of air admittance valve; the large 110mm valve for use with soil pipework and a smaller 32mm or 40mm version for use on sink, bath, basin etc. smaller bore waste pipes.

To get the ends of the pipe in easily, if you’re working in situ, you may need to remove the pipe from any clips or push it to either side a little to create some wiggle room, however when doing this ensure you don’t strain or bend anything that could potentially create leaks.With all the pipework in place and the valve securely fitted, allow enough curing time for the solvent adhesive and then give the valve a test to make sure all is working ok and the issue that caused you to install the valve in the first place has now been resolved. Installing 110mm Air Admittance Valves The air admittance valve (AAV), or Durgo valve as it’s also known helps to regulate the air pressure inside waste pipework and soil pipes, stop any smelly gas from escaping and also ensure solid waste is allowed to drain away to the main drain correctly.

All pipework contains air and in it’s natural state it sits in the pipes at the same atmospheric or neutral pressure that any other undisturbed air sits at.Airflow Requirements: Different valves allow for varying amounts of airflow. It’s essential to choose one that can handle the airflow requirements of your plumbing system to maintain efficiency. If the section of vertical pipe is fairly long, you will have to add at least 1 pipe clip to secure the pipe firmly to the wall. However, like the 110mm versions, the smaller ones must also finish above the highest flood level of the room the valve is in e.g. in the case of the basin above, it must be higher than the overflow of that basin. POLYPIPE Soil & Vent Fitting - Anti-Syphon Unit (Automatic Air Admittance Valve) for Ø32mm (1 1/4'') Solvent Weld Waste Pipe; White.