Piston Type Water Hammer Arresters
Piston Type Water Hammer ArrestersPiston Type Water Hammer ArrestersPiston Type Water Hammer Arresters
Share this page

Piston Type Water Hammer Arresters

Figure Number:  5201-5250
Smith’s Water Hammer arresters internally absorb hydrostatic shock pressure in water lines without the need for service or maintenance.
Product Function:
Designed to absorb and control shock pressure in water lines from surges during quick valve closure. Recommended for plumbing fixtures in office buildings, retail, schools, hospitals, correctional facilities, and public buildings. The piston type water hammer arrester is designed to be compact in size allowing for installation in a 2" x 4" (50.8 x 101.6 mm) wall space.

Lead Free Product Feature:

Lead Free Law (US Senate Bill S.3874) passed and was signed by the President on January 04, 2011 with the effective date of January 04, 2014. This Federal Law mandates the wetted surface of pipe, fixture and fittings sold for or installed in potable water applications conveying potable water for the purpose of drinking and/or cooking purposes, not contain more than 0.25% lead by weight.  Similar laws have also been passed and are already in effecti in California, Vermont, Maryland and Lousiana. This JR Smith product does meet this criteria.



Regularly Furnished:
Water hammer arresters consists of seamless, cold rolled and spun closed copper; pressurized arrester chamber; poly piston with two EPDM O-rings.

The casing is all copper tube spun closed at the top to provide a seamless constructed unit permanently sealing a 60 PSIG air charge cushion above a two oring piston. A NPT solid hex bass adapter is provided at the bottom of the unit for fast and easy installation to the potable piping system. The two EPDM o-rings are lubricated with Dow Corning, FDA approved 111 Silicone Compound. The piston is HHPP and is tested for charge leakage and proper charge pressure. The unit is available in either male thread (no suffix) or male sweat end connection (-SC Suffix). It is designed to operate with domestic or commercial potable water systems. The temperature range is 33º to 250º F (0.55° to 121.11°C)
Related Figure Numbers
  • 5201 - Threaded Connection 1/2" IPS
    (Sizing Symbol AA – 1 to 3 Fixture Unit Capacity)
  • 5205 - Threaded Connection 1/2" IPS
    (Sizing Symbol A – 4 to 11 Fixture Unit Capacity)
  • 5210 - Threaded Connection 3/4" IPS (Sizing Symbol B – 12 to 32 Fixture Unit Capacity)
  • 5220 - Threaded Connection 1" IPS (Sizing Symbol C – 33 to 60 Fixture Unit Capacity)
  • 5230 - Threaded Connection 1 1/4" IPS (Sizing Symbol D – 61 to 113 Fixture Unit Capacity)
  • 5240 - Threaded Connection 1 1/2" IPS (Sizing Symbol E – 114 to 154 Fixture Unit Capacity)
  • 5250 - Threaded Connection 2" IPS (Sizing Symbol F – 155 to 330 Fixture Unit Capacity)
  • 5201-SC - Sweat Connection 1/2" IPS
    (Sizing Symbol AA – 1 to 3 Fixture Unit Capacity)
  • 5205-SC - Sweat Connection 1/2" IPS
    (Sizing Symbol A – 4 to 11 Fixture Unit Capacity)
  • 5210-SC - Sweat Connection 3/4" IPS (Sizing Symbol B – 12 to 32 Fixture Unit Capacity)
  • 5220-SC - Sweat Connection 1" IPS (Sizing Symbol C – 33 to 60 Fixture Unit Capacity)
  • 5230-SC - Sweat Connection 1 1/4" IPS (Sizing Symbol D – 61 to 113 Fixture Unit Capacity)
  • 5240-SC - Sweat Connection 1 1/2" IPS (Sizing Symbol E – 114 to 154 Fixture Unit Capacity)
  • 5250-SC - Sweat Connection 2" IPS (Sizing Symbol F – 155 to 330 Fixture Unit Capacity)
NameDescriptionFile Size
Specifications US Govt ComplianceItems complying with U.S. government specifications34 KBDownload