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- Locke Part #: M1923
- Mfg. Part #: JBSPT-300
- Manufacturer: JB Industries
- Air admittance valves (AAVs) are one way valves that allow air in, to vent or equalize pressure in waste pipes, without allowing gases, odors, or liquid out. Ayrlett brand
- AAVs have been tested by an independent U.S. lab 500,000 cycles, in temperatures ranging from -40 to 150 F, without a single failure.
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