RV air admittance valve / sewer vent check for gray water tanks. Made of high-quality ABS plastic. Vent is installed under the sink to keep correct pressure in sewer pipes. 1-way valve stops odors. Valve is self-cleaning- spins to scrub debris off while valve is open. Will want to seal threads with solvent cement (sold separately). Made to fit Newmar part number 142306
Install on 1 1/2-inch diameter ventilation pipe. Black tailpiece measures 1 1/2 inches x 4 inches. Total length (including the valve) is about 5 1/2 inches.
