The noise from banging pipes is caused by shocks of high speed water flowing in the piping system when a fixture is suddenly closed. Sudden stoppage of the water (a non-compressible liquid) flowing at a given pressure and velocity causes a surge or spike of water and is called water hammer. When this occurs, a pressure wave travels back through the piping until it finds a point of relief. The LF15M2 and LF15M2S Water Hammer Arrestors are designed to eliminate this effect. The LF15M2 and LF15M2S features Lead Free* construction to comply with Lead Free* requirements. Dishwashers, clothes washers, fast closing positive shutoff valves incorporated in the system all contribute to creating water shock which is not only annoying but damaging to pipes and appliances. The Watts Series LF15M2 and LF15M2S incorporates a precharged, permanent sealed air chamber to absorb the shock. The sealed chamber the loss of air to the water and assures long and trouble-free life.

This 0750150 1/2 inch, unit size A lead free water hammer arrestor is used in commercial and industrial applications to control water pressure shock and prevent water hammer conditions. It consists of a copper body with a solder end connection, EPDM seals and O-rings, polypropylene piston, and cap. It is factory air charged at 60 psi (4.2 bar) and is permanently capped and epoxy sealed to absorb the shock and is not rechargeable. It may be installed in new or existing plumbing systems with a standard pipe tee vertically, horizontally or at any angle and is ideal for commercial dishwashers, washing machine, and quick-closing faucets applications. It is designed to operate on all domestic and commercial lines at 150 psi (10.3 bar) working pressure. This water hammer arrestor, size A is used to cover the required PDI listed 1 to 11 fixture units.

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