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The Oatey 39221 is a two to three inch air admittance valve designed for plumbing drainage systems. This valve allows air to enter the system when negative pressures develop, preventing siphoning and ensuring proper drainage.
This air admittance valve is ideal for preventing vacuum conditions in plumbing systems, making it essential for drainage applications.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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