Specification Sheet

Distributed Exclusively by Ferguson and Wolseley Canada
©2019 Ferguson Enterprises LLC 1440591 0819
General Specifications
An air admittance valve shall be acceptable as a vent termination for any individual
vent, common vent, circuit vent, loop vent, island fixture vent, vent stack or stack
vent to prevent siphonage of a fixture trap.
The purpose of an air admittance valve is to provide a method of allowing air to enter
the plumbing drainage system without the use of a vent extended to open air and
to prevent sewer gases from escaping into the building. An air admittance valve is
a one-way valve designed to allow air to enter the plumbing drainage system when
negative pressures develop in the piping system. The device shall close by gravity
and seal the vent terminal at zero differential pressure (no flow conditions) and under
positive internal pressures.
Product Location Specifications
• Should be located a minimum of 4" above the weir of fixture trap for single fixture
and branch venting and 6" above flood level of highest fixture for stack venting
• Each valve should be installed in an accessible location
Model Numbers
SKU Description DFU Rating Adapter
PFAAV500A 160 BR/500 STK AAV 3-4 ABS ADPT
160 Branch,
500 Stack
3" x 4"
PFAAV500 160 BR/500 STK AAV 3-4 PVC ADPT
160 Branch,
500 Stack
3" x 4"
Product Features
• Unique technology opens at -0.01 psi and seals at 0 psi and above
• Screening on air inlets to guard the seal
• Protective rubber sleeve provides grip for installation and keeps
valve free from debris
• 100% functionally tested at 1/4" H
2
0 and 30" H
2
0 ensuring
trouble-free performance
• Limited lifetime warranty
PFAAV500
Air Admittance Valves