EST Series

Water Hammer Arrestors

Envotec EST series Water Hammer Arrestors are used to absorb the shock when water flowing in a piping system suddenly stops due to fast closing of shutoff valves, solenoid valves, dishwashers, washing machines, and similar applications. These arrestors protect against annoying and potentially damaging effects of water hammer. Recommended to install in residential and commercial applications.


  • Body: Hard drawn copper with a custom internal mirror finish
  •  Seal Lubricant: Dow-corning silicone compound, #111 FDA approved for use in the potable water system
  •  Piston: Teflon
  •  Seals: O-Rings(2), EPDM
  • Threaded Adaptor: Brass

  • Max. Working Pressure: 350psi (24bar)
  • Max. Working Temperature: 250ºF (121ºC)

Compliance to:
ASSE/ANSI 1010 Water Hammer Arrester Standard
PDI WH-201 Water Hammer Arrester Standard

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