Mini-Rester Water Hammer Arrestor, Straight - 1/2" Male Sweat (Lead Free)

Water hammer occurs when the flow of moving water is suddenly stopped by a closing valve. This sudden stop results in a tremendous spike of pressure behind the valve which acts like a tiny explosion inside the pipe. This pressure spike reverberates throughout the plumbing system, rattling and shaking pipes, until it is absorbed. Normally, a sufficient pocket of air will absorb such a pressure spike, but if no pocket of air is present, expensive fixtures and appliances within the plumbing system will be damaged as they are left to absorb this pressure spike. Straight sweat arresters are compatible with press-fitting systems, such as Viega ProPress and all push-fitting systems such as Cash Acme SharkBite® All Mini-Resters are AA size All Mini-Resters are approved for sealed wall installations with no access panel required May be installed at any angle Materials: Arrester body: type L copper tube Piston: poly piston with two EPDM o-rings Male thread fitting: no-lead brass MIP thread Piston lubrication: Dow-Corning, 111 FDA approved silicone compound