The Oatey 39019 Sure-Vent® Air Admittance Valve (AAV) allows air to enter the plumbing drain system when negative pressure occurs, helping prevent trap siphoning and maintaining smooth, reliable drainage without the need to connect to a traditional vent stack.

• Admits air to relieve negative pressure and support proper drain flow
• One-way valve design helps prevent sewer gases from escaping into the home
• Rated for up to 160 DFU on branch lines and 24 DFU on stack applications
• Includes ABS Schedule 40 adapter for 1-1/2 in. to 2 in. pipe installations

Ideal for island sinks, remodel projects, and other applications where conventional venting is not practical.