Studor - 20302 - Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve … Hot Water System Helps restore filtration tank performance

Helps restore filtration tank performance without replacing the entire system

Large cookware

Single relay astronomical timer module

Inspect the spring

with power disconnected and all electrical work completed by a qualified professional

Studor - 20302 - Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve … Hot Water System Helps restore filtration tank performanceBrand: 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.