The Studor Maxi-Vent Air Admittance Valve with Push-Fit Rubber Connector offers a simple drain and waste venting solution. Designed for use as an individual, branch, circuit, or stack vent, the Maxi-Vent can fit both 3- and 4-inch pipes. This one-way valve automatically opens and takes in fresh air when negative pressure (suction) occurs from a fixture discharging into the plumbing system. When the water flow stops, the Maxi-Vent closes naturally due to gravity, preventing the circulation of any bad bathroom or drain odors.

Can be used as an individual, branch, circuit or stack vent

Will vent up to 500 DFUs on a stack

Fits 3" with no-hub type coupling

Fits 4" with rubber gasket provided

Reduces the number of fire-stopping applications

ANSI/ASSE 1051, ANSI/ASSE 1050, NSF 14, ETL, ICC-ES PMG-1025, C-IAPMO

Exclusive vermin protection system

Limited lifetime warranty for replacement of defective valves

Residential or Commercial Use

Expands architectural design limits

California Residents: WARNING – www.P65warnings.ca.gov