2 Pcs Inch NPT ABS in Line Vent Black Air Admittance Valve to Prevent Sewer
Working principle:The air vent valve features a spring-loaded design. As water and waste flow through the drainpipe, negative pressure is created within the pipe, causing the seal to lift and allow air to enter.
2 Pcs 1-1/2″ ABS Air Admittance Valve Inline Vent Black
🔧 Help protect your plumbing system with this 2-piece black ABS inline air admittance valve set. • Product Type: Inline Air Admittance Valve. 💨 Spring-loaded valve allows air into the drainpipe when negative pressure occurs, then seals back automatically.