Danco 7/16 in. D X 5/16 in. D Rubber O-Ring 20 pk 4-40-490-03 The purpose of an air

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

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It comes with a champagne hanger for easy display

Product Type: Wire Wheel

Danco 7/16 in. D X 5/16 in. D Rubber O-Ring 20 pk 4-40-490-03 The purpose of an airO rings are one of the simplest, yet most engineered, precise, and useful seal designs ever developed. O rings are available in various metric and inch standard sizes. Sizes are specified by the inside diameter and the cross section diameter (thickness). Danco o rings will repair your leaky faucet and prevent future leaks. Faucets usually have one or more o rings to prevent water from leaking out around the spout. Replacing worn out o rings is an