Warranty

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8888
BACKFLOW
PREVENTERS
BACKFLOW PREVENTERS
ACCESSORIESSTRAINERS
AUTOMATIC
CONTROL VALVES
PRESSURE
REDUCING VALVES
FIRE
PROTECTION VALVES
THERMOSTATIC
MIXING VALVESRELIEF VALVES
MISCELLANEOUS
PLUMBING PRODUCTSREPAIR KITS
APPLICATIONS
The pressure relief valve prevents pressure build-up in
a fire protection system or other closed type system
whenever the line pressure exceeds the setting of the
spring caused by pumps, elevated piping and thermal
expansion.
FEATURES
• 1/2", 3/4"
• Available pressure ranges: 50 to 200 psi standard
(UL), 150 to 300 psi (UL)
• 140°F max
• Body and cover materials: cast bronze, stainless steel
APPROVALS AND APPLICABLE
STANDARDS
• UL® listed, FM® Approved
SIZE
LEAD-FREE EXEMPT
PART NUMBER
LEAD-FREE EXEMPT
LIST PRICE EA.
P4000A: RELIEF VALVE, FNPT X FNPT, 50-200 PSI
 -PA 597.60
 -PA 597.60
P4000AHR: RELIEF VALVE, FNPT X FNPT, 150-300 PSI
 -PAHR 668.90
 -PAHR 668.90
TYPICAL INSTALLATION
Underwriters Laboratories requires the installation
of pressure gauges upstream and downstream of
the pressure reducing valve. Also, a relief valve of
not less than 1/2" in size must be installed on the
downstream side of the pressure control valve.
Adequate drainage for the relief valve discharge must
be provided.
FIRE PUMP
ZW215FP
SUCTION PREESURE
REGULATING VALVE
ZW209FP
FIRE PROTECTION
PRESSURE REDUCING VALVE
MODEL P4000A
THERMAL EXPANSION
RELIEF VALVE
ZW205FP
FIRE PUMP
RELIEF VALVE
FIRE PROTECTION
WATER SOURCE
TO FIRE SUPPRESSIO
N
NETWORK
DIRECTION OF FLOW
TYPICAL INSTALLATION
P4000A – PRESSURE RELIEF VALVE