Oatey 1-1/2 in. or 2 in. Sure-Vent PVC Air Admittance Valve

The Oatey Sure-Vent Air Admittance Valve provides a reliable method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air, preventing sewer gases from escaping into the building. Operating as a one-way valve, it opens to equalize negative pressures when fixtures discharge and closes by gravity to seal the vent terminal under zero differential and positive internal pressures. Constructed from durable PVC, this valve is engineered for secondary venting applications and ensures dependable, trouble-free drainage performance while protecting indoor air quality.