Stainless Steel T&P Relief Valves

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T&P Relief Valves


With an innovative spirit, Hubbell announces another game-changing product! The industry's first 316L stainless steel combination temperature and pressure (T&P) relief valve that's ASME stamped, ANSI approved, CSA certified, and specifically designed for use in ultrapure RO/DI water heating systems. In the past, options for T&P relief valves suited for use in RO/DI water heating systems were non-existent; until now! The majority of hot RO/DI systems in operation use a brass pressure-only relief valve that lacks temperature relieving capability, easily corrodes, may not meet ASME standards or local plumbing installation codes and ultimately jeopardizes the integrity of the RO/DI system. With this in mind, Hubbell is proud to introduce the only 316L stainless steel temperature & pressure relief valve with all 316L stainless steel metallic parts for improved safety of any hot RO/DI water heating system without compromising water purity or quality, adding years of worry-free service. Finally you can specify and install a T&P relief valve designed for hot RO/DI water that eliminates any questions or concerns and adds no contaminants...a Pure winner!


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Connection Inlet: 3/4" Male NPT Relief Pressure: 150 PSI


3/4" Female NPT Body Material: 316L Stainless Steel
Relief Capacity   Spring Chamber: Aluminum (non-wetted surface)
CSA: 205,000 BTU/Hr Seat Disc: Silicone
ASME: 1,912,000 BTU/Hr Shipping Weight: 1.73 LBS
Relief Temperature: 210 Degrees Fahrenheit    
Approvals: ASM Section IV, HV Stamped
ANSI Z21.22-2015
CSA 4.4-2015
CRN CSA-0G1438.6C

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316L Stainless Steel T&P Relief Valve
Connections - Inlet: 3/4 Male NPT | Outlet: 3/4 Female NPT | Approvals- ASME, ANSI, CSA, CRN

  BFO Part#:





  • 316L Stainless Steel Construction Corrosion Resistant (indoor and outdoor applications)
  • Temperature sensing element relieves at 210°F
  • Pressure relief at 150 PSI
  • ASME section IV, HV stamped
  • ANSI Z21.22 / CSA 4.4, CRN approved


  • Hot RO/DI water systems for finishing and cleaning electronic and fabricated metal parts (PC boards, microchips, capacitors, pharmaceuticals, jewelry, aerospace, cosmetic & drug packaging systems, glass products)
  • Ultrasonic cleaning systems
  • Water purification
  • Food service & food production

*Note- Multiple relief valves can be used to achieve greater BTU relief capacity.