ASSE Standard #1010-2025
Performance Requirements for Water Hammer Arresters
ANSI Approved: November 2025
Water hammer arresters are installed on water distribution system piping to prevent detrimental surge pressures within water distribution systems, thereby prolonging the service life of valves, piping, fittings, trim, equipment, appliances, appurtenances, and other devices which are part of the distribution system; and to eliminate noise. This standard applies only to those devices classified as water hammer arresters having a permanently sealed cushion of gas isolated from the water way, and designed to provide continuous protection, without maintenance, against detrimental surge pressures within the water distribution system.
A downloadable version of this standard is also available.
