Owner's manual

For Residential and Commercial Applications
ES-LFX65B
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LFX65B
Water Pressure Reducing Valves**
Sizes:
1
⁄2" – 2" (15 – 50mm)
Series LFX65B Water Pressure Reducing Valves are designed to
reduce incoming water pressure to a sensible level to protect plumb-
ing system components and reduce water consumption.
The LFX65B features Lead Free* construction to comply with Lead
Free* installation requirements.
The LFX65B is a cartridge style regulator and is orderable three
ways: As a complete, ready-to-install regulator, or as a separate
Rough-in Kit consisting of a Lead Free* cast copper silicon alloy
body with integral strainer, or as a separate Cartridge Assembly.
The LFX65B delivers superior flow performance with low fall off pres-
sure while reducing flow noise with its engineered seat design. The
LFX65B is a 100 percent balanced valve, as inlet pressures fluctuate,
reduced pressure does not.
The LFX65B incorporates control valve style stem and disc guid-
ance for accuracy and longevity. It is available with interchangeable
union tailpiece kits in standard-sized solder and threaded tailpieces
for Quick-Connect, PEX and CPVC options. The X65B Cartridge
Assemblies are available in standard pressure range of 20 - 80psi
(138 – 552 kPa), preset at the factory to 50psi (345 kPa) or high-
pressure range (HP) of 50 -150psi (345 – 1034 kPa) preset at the
factory to 100psi (6.9 bar). The standard bypass feature*** permits
the flow of water back through the valve into the main when pres-
sures, due to thermal expansion on the outlet side of the valve,
exceed the pressure in the main supply.
Features
• CartridgeStylevalveenablesquickandeasyinstallationor
service in-line.
• Greaterflowperformancewithlowerfalloffpressurefor
consistent operation
• Seatdesignreducesflownoise
• 100%balancedvalve,uniquetoWatts,providesreliable
flow performance
• Fullsizerangeavailableratedto400psitomeetyourcommercial
and residential applications
• CartridgeAssembliesavailableinstandardandhigh-pressure(HP)
models
• BypassfeatureinCartridgeAssemblycontrolsthermalexpansion
pressure***.
• Standardconstructionincludessealedspringcageandcorrosion
resistant adjusting and cage screws for accessible
outdoor or pit installations
• Highperformancethermoplasticintegralseatcartridge
• Unionconnectionandtailpiecekitsforsolder,Quick-Connect,
PEX, CPVC and threaded to meet your commercial and residential
applications.
• Hightemperatureresistantreinforceddiaphragmforhotwater
Specifications
Standard Specifications: A Water Pressure Reducing Valve with
integral strainer shall be installed in the water service pipe near
its entrance to the building where supply main pressure exceeds
60psi (413 kPa) to reduce it to 50psi (345 kPa) or lower. The valve
shall feature a Lead Free* cast copper silicon alloy body suitable
for water supply pressures up to 400psi (27.6 bar). Provision shall
be made to permit the bypass flow of water back through the valve
into the main when pressures, due to thermal expansion on the
outlet side of the valve, exceed the pressure in the main supply.
Water Pressure Reducing Valve with built-in bypass check valves
and integral strainer will be acceptable. Approved valve shall be
listed to ASSE 1003 and IAPMO and certified to CSA B356. Valve
shall be a Watts Series LFX65B.
* The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
** A water saving test program concluded that reducing the
supply pressure from 80 to 50psi (551-345 kPa) resulted in a
water savings of 30%.
*** The bypass feature will not prevent the pressure relief valve
from opening on the hot water supply system with pressures
above 150psi (10.3 bar).
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
without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Adjusting Screw
Lock Nut
Lock Seal
Spring Washer
Spring
Spring Cage
Stem Nut
Stem Lock Washer
Diaphragm Pressure
Plate
Diaphragm
Base Plate
Valve Stem
Stem O-ring
Strainer
Seat Cartridge
Disc Holder
Disc
Valve Body
Gauge Port Plug
Series LFX65B
LEAD FREE
*