STUDOR MAXI-VENT Air Admittance Valve, 3/4 inch Nominal Size, ABS Body, 3 inch ID x 4-7/8 inch OD x 5-1/4 inch length
The unique design of the STUDOR MAXI-VENT provides plumbing ventilation to prevent the loss of water seals inch traps without the need for costly roof penetration and vent piping.