Oatey Sure-Vent 20 DFU Capacity Air Admittance Valve's one-way valve allows air to enter the plumbing drainage system when negative pressures develop in the piping system. The purpose of an Air Admittance Valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building. An Air Admittance Valve is a one way valve designed to allow air to enter 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. Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry

• Sweet Spot technology opens valve at -0.01 psi and seals at 0 psi and above
• For use as a secondary vent
• One size approved to handle up to 3" vent pipe
• Opens/closes as needed by building's plumbing system
• Vents up to 160 DFU Branch or 24 DFU Stack

Weight	0.2 lb
Connection Size	1-1/2 to 2 in.
Finish	White
Height	3.23 in.
Horse Power	1/3
Length	9.41 in.
Type	Air Admittance Valve
Width	3.35 in.
Inventory Number	CHEM39238
MPN	39238