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Oatey Plastic Air Admittance Valve

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Complies to ASSE standard 1050 and 1051
For use as a secondary vent
One size approved to handle up to 4 in. vent pipe

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This Oatey PVC air admittance valve is sensitive to pressure changes and is able to consistently open and close. It features superior engineering and stringent quality standards to ensure a lifetime of unmatched performance. Use it as a secondary vent. This size is approved for an up to 4-in. vent pipe. The product is available in 6, 20, 160 and 500 DFU.

Complies to ASSE standard 1050 and 1051
For use as a secondary vent
One size approved to handle up to 4 in. vent pipe
Opens and closes as needed by building's plumbing system
IAPMO Listed
Closes through gravity