Studor - 20302 - Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve … Features_On-Surface perfect for sump pits with

perfect for sump pits with limited diameter (as small as 10

It is identified for the Infinity Series XL

813 inches

The broad 29-1/2-inch by 15-5/8-inch surface also provides an in-sink area for drying or staging large cookware

SKU: 3935AX6

Studor - 20302 - Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve … Features_On-Surface perfect for sump pits withBrand: STUDOR by IPS Corporation Manufacturer Part Number: 20302 Big Frog Supply SKU: 20302 Product Overview The STUDOR Maxi Vent 20302 is an air admittance valve for compatible 3 inch and 4 inch drain, waste, and vent systems. It can serve as an individual, branch, circuit, or stack vent where approved by the applicable plumbing code. When a fixture discharges and creates negative pressure in the drainage system, the one way valve opens to admit air.