Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve
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<b>[Product Information]</b><br>
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<li>For use with: Venting Single Fixture, Individual Branch, Circuit Vent Or Stack Type Application Up To 500 DFU</li>
<li>Material of Construction: ABS Plastic</li>
<li>Standards: ASSE Performance Standard 10510 And 1051, NES-592, NSF Standard 14, IAPMO, File No C-3803, ITS Intertek Testing Services</li>
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