Hayward® RPV Series Diaphragm Pressure Relief Valves

The all-thermoplastic diaphragm pressure relief valve is for protecting against over-pressure in chemical feed systems. When the preset pressure is exceeded, the diaphragm is forced up, and the chemical flows out of the relief port, back to the chemical tank, or the suction side of the pump. All valves are preset at 50 psi; however, they are field adjustable via the adjustment screw. Installation should always be made as close to the pump as possible, without any valves or accessories between the relief valve and pump. Typical applications include chemical dosing, transfer, processing, and chlorination systems.

  • PVC or CPVC body
  • PTFE/EPDM diaphragm
  • 304 stainless steel bolting
  • FNPT threads
  • Should be set approximately 15 psi higher than the system pressure
  • Adjustment screw with slot
  • Spring is rated for 10 to 150 psi & is preset to 50 psi
  • Maximum pressure: 250 psi @ 70°F (17.2 Bar @ 21°C)
Item # Description Catalog Pg. Price Add to Cart
1/4" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22487
280.1/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
280.1/Each
3/8" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22488
280.1/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
280.1/Each
1/2" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22489
303.4/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
303.4/Each
3/4" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22490
586.48/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
586.48/Each
1" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22491
810.16/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
810.16/Each
1-1/2" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22492
1546.21/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
1546.21/Each
2" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22493
1749.8/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
1749.8/Each
1/4" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22494
398.38/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
398.38/Each
3/8" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22495
398.38/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
398.38/Each
1/2" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22496
655.01/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
655.01/Each
3/4" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22497
757.56/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
757.56/Each
1" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22498
989.32/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
989.32/Each
1-1/2" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22499
2334.69/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
2334.69/Each
2" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22500
2575.8/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-497
2575.8/Each