39018 - Sure-Vent 1.5" - 2" 160 Branch, 24 Stack DFU Air Admittance Valve with ABS Sch 40 Adapter

Oatey 39018 - Sure-Vent 1.5" -  2" 160 Branch, 24 Stack DFU Air Admittance Valve with ABS Sch 40 Adapter The purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing system without the use of a ventextended to open air and to prevent sewer gases from escaping inside a building. The Oatey Sure-Vent 1.5" – 2" 160 Branch, 24 Stack DFU Air Admittance Valve with ABS Schedule 40 adapter is a one-way valve designed to allow air into the plumbing drainage system when negative pressures develop in the piping system, eliminating the need to tie into a stack vent. Superior engineering along with stringent quality standards ensure unmatched performance as a secondary vent. Oatey products have earned the trust of plumbing professionals for over 100 years. Features Sure-Vent air admittance valve with ABS Sch. 40 adapter One size approved to handle 1-1/2 in.–2 in. vent pipe Use as an alternative to a secondary vent in a DWV system Vents up to 160 DFU Branch or