FloPlast AV32 32mm Air Admittance Valve-Compression, White

Product Information

Polypipe Soil & Vent: Anti-syphon unit (automatic air admittance valve) for Ø32mm (1 1/4'') waste pipe allows air to enter branch discharge pipes, protecting water seals in traps from effects of negative pressure and preventing self-siphonage.

Once you have found the ideal install location the next task is to cut the existing waste pipe so that you can fit a T-piece or equal-T as it’s known to run the vertical pipe to fit your AAV. The primary purpose of both vents and valves is to regulate the pressure in the drainage system and, in this, they both perform equally well. The only real difference is in how they can be installed, and that's where an AAV can nose its way into the lead.With this in mind, as this does happen, it’s essential that your valve is placed in a location that can be easily accessed. 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. This can be in the actual room or in the case of a loft conversion, this may also be in the eaves behind the room and appliance. A popular choice is under the sink with the valve extended up behind it so it’s well above the plug hole.

POLYPIPE Soil & Vent Fitting - Anti-Syphon Unit (Automatic Air Admittance Valve) for Ø32mm (1 1/4'') Solvent Weld Waste Pipe; White. 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.Not only that, but our soil and waste systems connect to the mains sewer (unless you have an off-mains system), which means that gases produced by everyone else's waste in your street can float up through your pipes. While they do not generally pose a significant health risk in low concentrations, exposure to certain chemicals that can be present (such as hydrogen sulfide) can irritate your eyes, give you a sore throat or cough, and cause shortness of breath. However, prolonged exposure to, or higher concentrations of, these chemicals and gases can be a much more severe health risk. Hydrogen sulfide and methane build-up can even be an explosion risk since both are highly flammable.

Pipe Size Compatibility: Ensure the valve is compatible with the size of your waste pipe. Universal valves are versatile, while specific size valves provide a tailored fit. You’d usually install the air admittance valve within the loft or it is boxed in within the property. Sometimes they’ll be installed in airing cupboards, usually to keep them out of sight. Obviously the valve needs to let air in, so it’ll need to be installed somewhere where there is access to air to allow ventilation. The other consideration is that it will need to be installed somewhere that is easily accessible for when there is a need for maintenance. Can you use one outside? Solvent Weld Fixing: This basically involves the same methods as when you cut and joined the T-piece in the steps above. Take the solvent weld and apply it to the top of the vertical pipe and also inside the collar of the AAV. Place the AAV on top of the pipe and ensure that it is pushed down and seated correctly. Leave it to cure for the manufacturers recommended time (normally around 24 hours) In the majority of cases and in most homes in the UK, the balance of pressure within a waste pipe system is maintained through a soil vent system. This is just a vertical extension of the soil pipe system that stops beyond the highest drainage point in the property.As the pipe is not capped and left fully open, air can easily be pulled down through to ensure the correct balance is maintained in the pipework. An added bonus is that any gases can also escape up and out if needed.

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.The most commonly sold AAV is the rubber push fit ones that we sell here at EasyMerchant. They’re easy to install, a matter of just pushing them into the pipe, and they’ll create a watertight and airtight fitting. Some will prefer the solvent weld air admittance valves though, as once cemented these will create a permanent connection. Are there any issues to consider when using an air admittance valve? They should only ever be fitted to vertical pipe runs. If they’re fitted on they’re side this can cause the seal to fail Locate the highest point in the room, in most cases this will be the sink plug hole and use a spirit level to transfer the height of this point over to your install area and then mark the wall.