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Plastic Air Admittance Valve with 1-1/2-in OD Connection

Dearborn Plastic Air Admittance Valve with 1-1/2-in OD Connection

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why is my drain slowly draining after replacing the vent and why when I loosen the vent it starts to drain? Is the vent bad?


If you have any further questions, please reach out to us at technical@oatey.com.

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Depending on the distance of the trap to the vent pipe, your application may require an air admittance vent with higher DFU's. Consider Lowe's item # 29145 for greater distances.

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