McAlpine Air Admittance Valve Internal/External Black 110mm

The McAlpine Air Admittance Valve diaphragm lifts and allows air to be drawn into the system when it is subjected to negative pressure. On cessation of negative pressure the diaphragm returns to the closed position thereby preventing the escape of foul air into the building. The valve is designed to open and close spontaneously when required thereby allowing a supply of air to adequately ventilate the system thus ensuring a smooth discharge.

Features:

Internal:

• Enables ventilating pipes to be terminated inside the building thereby avoiding roof penetration.
• Incorporates a stainless steel mesh in the air intake.
• Allows greater flexibility in design of new drainage systems.
• Allows greater flexibility when installing additional appliances to existing drainage systems.
• Eliminates problems of freezing associated with external pipes.
• Suitable for use with either plastic or metal pipes.
• Offers cost savings in both material and labour.

External:

• There are no regulations for an AAV to be installed externally, although it may be advantageous in certain circumstances.
• The external soil stack may be terminated below the roofline which reduces the amount of soil pipe and fittings required.
• The AAV may be installed at a minimum height of 200mm above the highest wet branch connection.
• Fitted externally the AAV is easy to access for maintenance if required.
• Reduces installation time and materials.
• It may be prudent to seek guidance from the local building department.

Technical data:

• Brand - McAlpine
• Product Type - Admittance Valve
• Product Code - VP100E
• Material - Synthetic Rubber
• Colour - Black
• Fits Soil Pipe Diameter - 110mm
• Weight - 0.5kg
• Temperature Range - -20°C to +60°C
• Air flow Capacity - 40ltr/s

Standards & Certifications:

• Complies with BS EN 12380:2002.

Please Note:

• McAlpine recommend that Air Admittance Valves be installed internally within the building.
• AAVs should be located preferably in a non-habitable space such as a duct or roof space with adequate ventilation and must be accessible for maintenance. AAVs must be installed in the vertical position.