Best deal 👍 Oatey Sure-Vent 1-1/2″ Air Admittance Valve, 160 Branch, 24 Stack, Abs 😀

An air admittance valve provides a method of allowing air to enter the plumbing drainage system without the use of a vent, extended to promote air flow and prevent sewer gases from escaping into a building. The Oatey Sure-Vent 160 Branch, 24 DFU Stack Air Admittance Valve is a one-way valve designed to allow air into the plumbing drainage system when negative pressures develop in the piping system. The device shall close by gravity and seal the vent terminal at zero differential pressure (no flow conditions) and under positive internal pressures. Superior engineering along with stringent quality standards ensure unmatched performance. You can install with confidence knowing Oatey products have earned the trust of plumbing professionals for over 100 years.

• AAV vent prevents sewer gases from escaping into a building
• For use as a secondary vent, approved to handle up to 3 in. vent pipe
• Offers unmatched breathing capability with a unique sealing system
• Protective sleeve provides grip for installation and keeps valve free from debris
• Sweet Spot technology design can hold up to pressure changes
• Heavy-duty plastic frame is resilient, lightweight, and non-toxic
• ABS adapter included for solvent welding to 1.5 to 2 in. ABS pipe