Submittal Sheet

Series N45B - EZ
Water Pressure Reducing Valves*
Sizes:
1
⁄2" – 1" (15 – 25mm)
Series N45B-EZ Water Pressure Reducing Valves are designed
to reduce incoming water pressure to a sensible level to protect
plumbing system components and reduce water consumption.
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
• Factory calibrated outlet pressure adjustment
• Easily adjustable pressure setting
• Double union inlet & outlet connections (option DU)
• Integral stainless steel strainer
• Thermoplastic cage & seat
• Bronze body construction
• Serviceable in line
• Bypass feature controls thermal expansion pressure**
Models
N45B-EZ-M1 NPT threaded female inlet x NPT
female outlet
N45BU-EZ-M1 NPT threaded union inlet x NPT female
outlet
N45BU-EZ-S-M1 Solder union inlet x NPT female outlet
N45BDU-EZ-M1 Double Union – NPT threaded union
female inlet and outlet
N45BDU-EZ-S-M1 Double Union – Solder union inlet and
outlet
N45BDU-EZ-PEX-M1 Double Union – PEX union inlet and
outlet
N45BDU-EZ-CPVC-M1 Double Union – CPVC union inlet and
outlet
For Residential and Commercial Applications
ES-N45B-EZ
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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N45BDU-EZ-M1
Integral Stainless
Steel Strainer
Thermoplastic Seat
Thermal Expansion
Bypass
Threaded, Solder,
PEX or CPVC ends
Reinforced
Diaphragm
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.
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 bronze 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 back into the main when pres-
sures, due to thermal expansion on the outlet side of the valve,
exceed the pressure in the main supply. Water Pressure Reduc-
ing Valve with built-in bypass check valves will be acceptable.
Approved valve shall be listed to ASSE 1003 and IAPMO and
certified to CSA B356. Valve shall be a Watts Regulator Com-
pany N45B-EZ-M1.
* A water saving test program concluded that reducing the supply
pressure from 80-50psi (551-345 kPa) resulted in a water savings
of 30%.
** NOTE: The bypass feature will not prevent the pressure relief
valve from opening on the hot water supply system with pres-
sure above 150psi (10.3 bar).