Studor 20349 REDI-Vent Air Admittance Valve, 1-1/2" or 2" ABS Adapter, White

Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

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Product Review

Allow air to enter DWV systems to equalize pressure when water drains out of the system; eliminate the need for costly roof penetrations and vent piping. 1ATD5 vents up to 500 DFUs on a stack; 1ATD6 vents up to 160 DFUs on a branch and up to 24 DFUs on a stack. 15W940 has a replaceable cabon filter to reduce plumbing drainage system odors.

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Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

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