Watts LF15M2 - Manual

Series LF15M2
Water Hammer Arrestors
Sizes: 1 ⁄
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
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 elliminate 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 pre-
charged, permanent sealed air chamber to absorb the shock. The
sealed chamber prevents the loss of air to the water and assures
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-LF15M2
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).
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 ______________________________________
LF15M2 LF15M2S
Body: Copper
Piston:
Polypropylene
Threaded Adapter: Lead Free* Brass
O-ring: EPDM
LEAD FREE
*
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.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.