Instruction Manual

ManualsBrandsWatts ManualsAccessories for electrical15M2

Series 15M2

Water Hammer Arrestors

Sizes:

⁄2" - 1" (15-25mm)

What is Water Hammer?

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 pressure and is called water hammer. When this occurs,

a pressure wave travels back through the piping until it finds a

point of relief.

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 appli-

ances. The Watts Series 15M2 incorporates a pre-charged,

permanent sealed air chamber to absorb the shock. The sealed

chamber prevents the loss of air to the water and insures long

and trouble-free life.

Features

• NPT solid hex brass adapter or solder end connection

for easy installation

• Approved for installation with no access panel required

• May be installed in new or existing plumbing systems with a

standard pipe tee vertically, horizontally or at any angle

• PDI Listed (PDI WH201)

• Maintenance free – piston is the only moving part

• Air pre-load is 60psi (4.2 bar)

• Factory air charged and permanently sealed

For Commercial Applications

ES-15M2

Pressure - Temperature

Operating Pressure: Designed to operate on all domestic and

commercial lines @ 150psi (10.6 bar) working pressure.

Temperature Range: 33°F to 180°F (0.5°C to 82°C).

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,

please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-

out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Standard: Listed by IAPMO, ASSE 1010 approved, ANSI

A112.26.1M approved, PDI WH201 approved and certified.

Standards

Materials

Job Name ___________________________________________ Contractor __________________________________________

Job Location _________________________________________ Approval ____________________________________________

Engineer _____________________________________________ Contractor’s P.O. No. _________________________________

Approval _____________________________________________ Representative ______________________________________

15M2

Body: Copper tubing

Piston: Polypropylene

Adapter: Brass

O-ring: EPDM

Summary of content (2 pages)

PAGE 1
ES-15M2 For Commercial Applications Job Name_ ___________________________________________ Contractor___________________________________________ Job Location__________________________________________ Approval_____________________________________________ Engineer______________________________________________ Contractor’s P.O. No.
PAGE 2
Sizing and Placement Up to 20 ft. (6m) No. 15M2 Water Hammer Arrestor Riser X Rule 1 Typical Branch Line Over 20 ft. (6m) Y X Rule 2 As shown, it has been established that the preferred location for the water hammer arrestor is at the end of the branch line between the last two fixtures served. The location of the water hammer arrestor shown above applies to branch lines that do not exceed 20 ft.