2024年1月2日 · Air admittance valves (AAVs) are installed directly on to the soil stack without the need for a hole to be made in the property roof, reducing the amount of pipework required and the costs of making good the roof, and minimising risks of weather damage and water ingress.

Across the UK, Building Regulations and statutory guidance allow for both open soil pipes (stacks) or air admittance valves (Figure 1). Whereas the simplest and probably most familiar solution is an open soil pipe, it needs to terminate at least 900mm above any opening to the building, such as a window or balcony.

The BPF Pipes Group has just launched new guidance on domestic air admittance valves (AAV) for those working within the plumbing sector in the UK. The document provides clear advice on how to position air admittance valves correctly, as well as highlighting the different regulations currently in place across England, Wales, Scotland and ...

The BPF Pipes Group has just launched new guidance on domestic air admittance valves (AAV) for those working within the plumbing sector in the UK. The document provides clear advice on how to position air admittance valves correctly, as well as highlighting the different regulations currently in place across England, Wales, Scotland and

What is an air admittance valve? Air admittance valves, also known as AAVs or durgo valves, are valves that help to re-balance the pressure within a soil pipe to normal levels. Pressure changes occur when a toilet is flushed or any water flows within the waste pipe because air is carried along the pipe with it. This creates negative pressure.

An AAV located below the spillover level potentially opens up the building to flood risk in the event of a blocked drain. However, there are different types of AAVs and you need to know the difference.

Drainage ventilation expert Studor has responded to market confusion about Air Admittance Valves (AAVs) and whether they can be used externally. Technical director Steve White said: “There does seem to be confusion in the market and we’re frequently asked whether AAVs are suitable for exterior use.

n An AAV requires a free movement of air around the valve to ensure its effective operation. n Third party assessments state any boxing around an AAV should be ventilated although guidance is not given on the amount

2019年2月27日 · External Air Admittance Valves will allow the installation of an external soil pipe within 3 metres of any opening and terminate at the same height as if it were installed internally, i.e. 200mm (minimum) above the highest wet entry point to the soil vent pipe. Eliminates the need for the installer to work & handle pipe above the roof line.

2020年5月21日 · That said, the UK government has passed into law the Automated and Electric Vehicles Act 2018 (“AEVA 2018”), which anticipates the introduction at some future point of “automated vehicles” onto public roads in Great Britain. For the purposes of the AEVA 2018, an automated vehicle is one that “drives itself” at least in some ...