Water Hammer Arrestor Sizing Guide

Water hammer arresters are simple devices that install within the water line to a specific fixture or appliance.

Water hammer arrestor sizing guide.

To help clear up the confusion the following article was excerpted from the pertinent sections of the plumbing drainage. Figure 2 these fixture unit values are the common values that most engineers utilize to size their water distribution systems. Arresters absorb the shock wave created by a sudden stoppage of the water flow. Ever since water was first conveyed by a piping system the destructive forces and hammer blow sounds associated with water.

Installing a water arrester on each line supplying the offending fixture or fixtures usually solves the problem. Water hammer arrestors shall be installed in accordance with the manufacturer s specifications. Water hammer arrestors zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. These methods have created confusion regarding the proper sizing and location of water hammer arresters among engineers contractors and other persons engaged in the plumbing industry.

Hammer and its damaging effects as they pertain to any piping system. This section covers the physics of uncontrolled water. Pex barb tee 1 2 pex barb fitting and uponor propex barb tee 1 2 pex barb fitting. Water hammer arrestors shall conform to asse 1010.

Lf lead free ed. Water hammer arrestors zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. These values can be used in the sizing and placement of engineered water hammer arresters at the same time that the piping systems are sized. Sizing and placement rule 1 covers multiple fixture branch lines which do not exceed 20 ft.

This table is used in pdi wh201 when sizing water hammer arresters. We also review the history of water hammer in plumbing systems previous attempts to control water hammer and why these methods failed. 4 standard pdi wh 201 water hammer arresters water hammer the term water hammer is well known to engineers contractors maintenance personnel and other persons engaged in the plumbing and piping industry. There have been various methods devised for the sizing of water hammer arresters.

Rule 2 covers multiple fixture branch lines which do exceed 20 ft.