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White PVC relief valve with adjustable pressure knob, 1-1/2 inch FNPT connections, stainless steel spring visible

Hayward Flow Control

Hayward Flow Control RV1150T Relief Valve 1-1/2" PVC/FPM Adjustable 5-75 psi accessory

SKU CH-PBHP-Z55EA

Adjustable PVC relief valve with FPM seat and stainless-steel spring, set at 25 psi and field-adjustable from 5 to 75 psi for 1-1/2 inch FNPT plumbing

  • Adjustable pressure range from 5 to 75 psi for flexible system protection
  • Factory set at 25 psi for immediate installation readiness
  • PVC body with FPM seat resists corrosion in demanding fluid applications
  • Stainless steel spring ensures reliable operation across 40 to 140 degrees F
  • Meets ASTM D1784 standard for material quality assurance

Adjustable Relief Valve 5-75 psi

The Hayward Flow Control RV1150T is a pressure-relief valve built for 1-1/2 inch FNPT piping. It protects PVC systems by opening automatically when pressure exceeds the set point. Installers use it on pumps, filtration loops and chemical-feed lines where over-pressure could damage equipment. The valve arrives new and ready for solvent-weld or threaded installation.

PVC body with FPM seat and stainless spring

The body and disc are moulded from PVC rated to ASTM D1784, while the seat uses FPM for chemical resistance. A stainless-steel spring provides the adjustable force between 5 and 75 psi, factory preset at 25 psi. No test lever is included, so verification requires an external gauge. These materials determine fluid compatibility and service life without adding electronic controls or software.

Pressure and temperature envelope

Operation is limited to 40 to 140 degrees F and a maximum set pressure of 75 psi. The 1-1/2 inch FNPT ports fix the flow capacity, so systems needing higher relief rates must use a larger valve. The 13 1/4 inch overall height and 4 5/16 inch length set the space envelope for piping layout. Buyers who need higher temperature ratings or larger port sizes cannot use this model.

Highlights

  • Adjustable pressure range from 5 to 75 psi for flexible system protection
  • Factory set at 25 psi for immediate installation readiness
  • PVC body with FPM seat resists corrosion in demanding fluid applications
  • Stainless steel spring ensures reliable operation across 40 to 140 degrees F
  • Meets ASTM D1784 standard for material quality assurance

Specifications

BrandHAYWARD FLOW CONTROL

Questions about this item

How often should the FPM seat and PVC disc be inspected or replaced on the RV1150T valve?

Inspect the FPM seat and PVC disc annually; replace them if you see cracking, hardening or leakage, since the valve operates between 40 and 140 °F and handles 5 to 75 psi.

What pressure limit will the RV1150T hit first during continuous operation?

The adjustable range tops out at 75 psi, so sustained system pressure cannot exceed that value without the valve opening.

How much heat does the RV1150T dissipate when it runs all day at 75 psi?

The valve body is PVC with a stainless-steel spring and contains no powered components, so it adds no measurable heat to the fluid stream.

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