Sioux Chief 654-C Hydra ester Water Hammer Arrester for Piping Systems Hydra-Rester male sweat fittings are compatible with press-fitting systems, such as viega process and all push-fitting systems Lifetime cycle tested at U.S. Testing laboratories to withstand 10,000 shock cycles. Factory tested to withstand 500,000 cycles without failure (654-C tested) Asset 1010 certified as a water hammer arrester that is designed to provide continuous protection, without maintenance allowing the Hydra-Rester to be installed without access panels Allows for installation in 2  4 wall cavity Installs at any angle