Oatey 1-1/2 in. ABS In-Line Cheater Air Admittance Vent

Help prevent sewer gas from entering your home while you vent your drain line with the Oatey 1-1/2 in. ABS In-Line Cheater Vent. This spring-loaded vent uses negative pressure to open and positive pressure to close. Also replaces secondary stack venting.|ABS construction|Use to vent drain lines|Helps prevent sewer gas from entering your home|Push to connect|Spring-loaded to open with negative pressure and close with positive pressure|NSF-24 listing for use in recreational vehicles