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┬«
  • Straight compression arresters install on any 1/2" nom. copper leg or riser. Especially popular in retrofitting 1/2" nom. air chambers
  • MIP thread arresters install on any new roughin or retrofit installation with 1/2" FIP fittings
  • CPVC solvent weld arresters install on 1/2" CPVC tube or fittings in rough-in or retrofit applications
  • 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

  • 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
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Connection Type:
OD Compression
Max. Working Pressure:
350 psi
Max Temp (F):
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