Specifications

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Typical Installation X Ref
Thermal Pressure Relief Valve P1520 Series
P1500/P1550 & P1520 Series Typical Installations
Features Applications
• 1/2”, 3/4”
• High capacity pressure relief valve
• Designed to relieve excessive system pressure caused by thermal
expansion
• All bronze body
• For cold water relief only
• Pressure settings 50, 75, 100 or 125 psi
• Male NPT inlet, female NPT outlet
For Additional Information, Ask For TP-P1500 or visit our web site.
Designed for installation on cold water service lines as a means of protection against excessive
pressure buildup. These devices are for pressure only and should be used in conjunction with
other temperature limiting devices. Also suitable for static relief, low capacity pump relief, pas-
sive solar, thermal expansion relief and other similar uses in commercial and industrial applica-
tions.
 Water pressure reducing valve (Model NR3)
 Vacuum relief valve (Model VR10)
Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted in accordance with manufacturers’
instructions and the latest edition of the Uniform Plumbing Code. Assembly shall be installed with adequate drain and sufficient side clearance for
testing and maintenance. The installation shall be made so that no part of the unit can be submerged or where relief valve discharge could cause
damage.
Accessories
PUMP INLET
DRAIN
PRESSURE RELIEF
VALVE MODEL 1550
STORAGE
TANK
OUTLET
INLET
TO DRAIN
PRESSURE RELIEF
VALVE
OUTLET
WATER PRESSURE
REDUCING VALVE
MODEL NR3
MODEL1520
INLET
TO DRAIN
VACUUM
RELIEF VALVE
MODEL VR10
OUTLET
PRESSURE RELIEF
VALVE MODEL 1550
STORAGE TANK
INLET
TO DRAIN
PUMP
OUTLET
PRESSURE RELIEF
VALVE MODEL 1500
WILKINS WATTS
P1520 53
Pressure Relief Valves