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)
Stock Description Catalog Pg. Price
1/4" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22487
233.01/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
233.01/Each
3/8" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22488
233.01/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
233.01/Each
1/2" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22489
252.08/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
252.08/Each
3/4" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22490
487.88/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
487.88/Each
1" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22491
673.02/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
673.02/Each
1-1/2" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22492
1286.37/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
1286.37/Each
2" RPV Series PVC Diaphragm Pressure Relief Valve
Item 22493
1455.82/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
1455.82/Each
1/4" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22494
331.37/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
331.37/Each
3/8" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22495
331.37/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
331.37/Each
1/2" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22496
544.9/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
544.9/Each
3/4" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22497
630.26/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
630.26/Each
1" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22498
823.05/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
823.05/Each
1-1/2" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22499
1942.41/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
1942.41/Each
2" RPV Series CPVC Diaphragm Pressure Relief Valve
Item 22500
2142.99/Each
Save 5% when you buy 2+
Save 10% when you buy 4+
Save 15% when you buy 12+
P-472
2142.99/Each