Specification Sheet

Series LFN45B-M1
Water Pressure Reducing Valves**
Sizes:
1
⁄2" – 1"
Series LFN45B-M1 Water Pressure Reducing Valves are designed
to reduce incoming water pressure to a sensible level to protect
plumbing system components and reduce water consumption. The
LFN45B features Lead Free* construction to comply with Lead Free*
installation requirements. This series is suitable for water supply
pressures up to 400psi (27.6 bar) and may be adjusted from 25 –
75psi (172 – 517 kPa). The standard setting is 50psi (345 kPa). All
parts are quickly and easily serviceable without removing the valve
from the line. The standard bypass feature permits the 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.
Features
• Integral stainless steel strainer
• Thermoplastic seat & cage
• Lead Free* cast copper silicon alloy body construction
• Serviceable in line
• Bypass feature controls thermal expansion pressure***
• Sealed spring cage on all models for accessible outdoor
or pit installations
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 water pres-
sure reducing valve shall be constructed using Lead Free* materials.
Lead Free* regulators shall comply with state codes and standards,
where applicable, requiring reduced lead content. 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 strain-
er will be acceptable. Approved valve shall be listed to ASSE 1003
and IAPMO and certified to CSA B356. Valve shall be a
Watts Series LFN45B-M1.
Materials
Body: Lead Free* cast copper silicon alloy
Seat: Thermoplastic
Cage: Thermoplastic
Integral Strainer: Stainless steel
Diaphragm: Reinforced EPDM
Valve Disc: Elastomer
LFN45BDU-M1
Integral Stainless
Steel Strainer
Thermoplastic Seat
Thermal Expansion
Bypass
Reinforced
Diaphragm
* 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 80-50psi (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 pressure above
150psi (10.3 bar).
For Residential and Commercial Applications
ES-LFN45B
LEAD FREE
*
Job Name
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Contractor
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Job Location
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Approval
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Engineer
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Contractor’s P.O. No.
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Approval
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Representative
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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.
NOTICE
Inquire with governing authorities for local installation requirements
The information contained herein is not intended to replace the full
product installation and safety information available or the experience
of a trained product installer. You are required to thoroughly read all
installation instructions and product safety information before begin-
ning the installation of this product.
NOTICE