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We’ve ranked and reviewed the top 20 best boiler pressure relief valves, enabling you to track prices across multiple websites and compare in-store or online options.
Best Boiler Pressure Relief Valves Comparison 2023
SaleBestseller No. 1 
Watts Regulator 0342692 Boiler Relief Valve 3/4" 30Psi, bronz
- Brand: Watts Regulator
- Part Number: 0342692
- Boiler Relief Valve 3/4" 30Psi
SaleBestseller No. 2 
Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 30 psi Set Pressure, 3/4" NPT Female
- Relief pressure preset of 30 psi for releasing excess pressure
- 3/4" female NPT threaded inlet for connecting to a male NPT connection
- ASTM B584 bronze body and nozzle and stainless steel spring for corrosion resistance
- 250 degrees F maximum temperature for use in high-temperature applications
- ASME safety rated for Section IV water heating systems
SaleBestseller No. 3 
Cash Acme 3/4 Inch RV FWL-2 Pressure Relief Valve, Bronze, 150 PSI, 14737-0150
- DESIGN: The NCLX Series relief valves feature a cast bronze body, brass, and stainless steel internal parts, silicone seat disc, and stainless steel pressure spring
- BRONZE BODY: Lead-free and superior reliability
- COMPACT: Pressure reducing and regulating valves
- CERTIFIED: To ASSE standard 1003 and CSA Standard B356; Certified lead free complying with NSF 319
- ASSEMBLED AND TESTED: Prepared in Cash Acme manufacturing plant in Cullman, Alabama
Bestseller No. 4 
WATTS SB1156F Boiler Pressure Relief Valve
- Designed To Work Effectively
- Convenient And Easy To Use
- Durable And Long Lasting
- Brand Name: Watts
Bestseller No. 5 
Watts Brass & Tubular 374A 3/4 Boiler Relief Valve
- Protects hot water space heating boilers Compact construction, produces exceptionally high capacity Protects boiler installations up to 550,000 Btu/hr at 30 lb
- This product adds a great value
- This product is manufactured in United States
Bestseller No. 6 
Watts 0342691 30 PSI Pressure Relief Valve, Bronze, 3/4" 335 M2-030
- Female pressure relief valve
- Inlet (in): 3/4
- Outlet (in): 3/4
- BTU: 510,000
- Inlet (in): 3/4
SaleBestseller No. 7 
Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 30 psi Set Pressure, 3/4" NPT Male x Female - 1040705
- Relief pressure preset of 30 psi for releasing excess pressure
- 3/4" male NPT threaded inlet for connecting to a female NPT threaded connection
- ASTM B584 bronze body and nozzle and stainless steel spring for corrosion resistance
- 250 degrees F maximum temperature for use in high-temperature applications
- ASME safety rated for Section IV water heating systems
Bestseller No. 8
Apollo Valve 10-400 Series Bronze Safety Relief Valve, ASME Hot Water, 50 psi Set Pressure, 3/4" NPT Male x Female
- Relief pressure preset of 50 psi for releasing excess pressure
- 3/4" male NPT threaded inlet for connecting to a female NPT threaded connection
- ASTM B584 bronze body and nozzle and stainless steel spring for corrosion resistance
- 250 degrees F maximum temperature for use in high-temperature applications
- ASME safety rated for Section IV water heating systems
Bestseller No. 9 
Hydro Smart 30 PSI Pressure Relief Valve, 3/4", NSF, CSA, ASME
- 30 PSI Relief Valve
- 419,000 BTU/HR
- Automatic Reseating Pressure Only Safety Relief Valve
- 3/4" Male Inlet and Female Outlet
Bestseller No. 10 
Cash Acme 3/4 Inch F-30 Safety Relief Pressure Release Valve, Brass Plumbing Fitting, 20166-0030
- CONSTRUCTION: Brass body for durability
- DIMENSIONS: 3/4-inch threaded male inlet x 3/4-inch threaded female outlet
- PRESSURE: 30 PSI set pressure
- USE: Designed for use on hot water service only - heating boilers, water supply heaters and storage tanks; not for use on steam
- HIGH QUALITY: SharkBite's quality and performance is field-proven with more than 550 million connections; SharkBite is the only push-to-connect brand that can ensure clean, leak-free connections
SaleBestseller No. 11 
Conbraco Industries 10-408-05 Relief Valve
- Manufacturer Model # 10-408-05
- Genuine Replacement Part
- Conbraco Industries Item
- Brand Name: Air Gas North Central
Bestseller No. 12 
Watts Regulator 174A Bronze 2-Port 3/4" Boiler Pressure Relief Valve, 40 psi
- Boiler pressure relief valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment
- It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring and test lever
- Series 174A resists corrosive water conditions, sticking and freezing and prevents water and sediment from being trapped in the seat
- It is designed for emergency safety relief and shall not be used as an operating control
- For pressure protection of hot water heating boilers
Bestseller No. 13 
GASHER 1PCS Brass Temperature Pressure Relief Valve with 3/4" NPT Thread
- Size: 3/4” NPT Thread
- Working pressure: 150psi;Temperature Range:-65℉~+250℉ Material:Made of solid brass, resistant to pressure, abrasion, corrosion, and durability.
- Material:Made of solid brass, resistant to pressure, abrasion, corrosion, and durability
- Function: For hot water service - heating boilers, water supply heating systems, protecting water heaters from excessive water temperature and pressure, not suitable for steam.
- Note: Before using pipe fittings to connect products, wrap an appropriate amount of Teflon tape to prevent leakage.
Bestseller No. 15 
Rheem SP12574 Temperature and Pressure Relief Valve,Small
- Size: Small.For best results, use only Rheem replacement parts for repairing your Rheem Water Heater
- Maximum Temperature Setting (Deg. F): 210, Maximum Pressure Setting (psi): 150, CSA Capacity (BTU/HR): 105,000, Inlet Thread Size - NPT (in.): 3/4
- Outlet Thread Size - NPT (in.): 3/4, Overall Length (in.): 7-1/4, Body Length (in.): 3-1/4, Sensor Length (in.): 4
- Kits which contain this part: 45W613
Bestseller No. 16 
Midline Valve GUHW-QSW256 Pressure Relief Valve for Tankless Water Heater, Forged Brass, 3/4 in. FIP x MIP
- 1 TANKLESS HEATER SOLUTION: Ideal for Releasing Pressure in your Tankless or Closed-Loop Hot Water Systems
- Fully Automatic Valve Reseats Itself after Relieving Pressure
- SUPERIOR QUALITY: Heavy Duty Forged Brass Construction; Lead Free; Dezincification Resistant; Corrosion Resistant
- UNIVERSAL FIT: Secure, Leak-Free 3/4 in. FIP x MIP Connections
- Easy Installation and Compact Design
Bestseller No. 17 
QWORK 150Psi Pressure Relief Valve with 3/4-Inch Pipe Thread, Pressure Reducing Valve
- High Quality: Brass construction, good high temperature resistant, anti-corrosion, sturdy and durable for long term service,100% brand new.
- Size: 3/4-Inch male NPT thread
- Function: Designed to protect water heater from excessive water temperatures and pressure
- Pressure rating : 150Psi
- 100% Satisfied Service: Enjoy a smooth & frustration-free experience with our 100% Satisfied Service in one Month!
SaleBestseller No. 18 
Cash Acme 3/4 Inch NCLX-5LX Temperature and Pressure Relief Valve, Push to Connect Brass Plumbing Fittings, Copper, CPVC Pipe, 150 PSI, 19783-0150
- CASH ACME RELIEF VALVE: Cash Acme NCLX Combination Temperature and Pressure Relief Valves are designed for the protection of water heaters and storage tanks; incorporate an inert thermal element coating that provides effective isolation from mineral deposits (liming) and galvanic corrosion
- DESIGN: The NCLX Series relief valves feature a cast bronze body, brass, and stainless steel internal parts, silicone seat disc, and stainless steel pressure spring
- COMPACT: Pressure-reducing and regulating valves
- SPECS: NCLX Valves come with standard factory settings of 150 PSI for pressure relief and 210 degrees F for temperature relief
- CERTIFIED: The NCLX Temperature and Pressure Relief Valve is certified to be lead-free in accordance with NSF 319; compliant with ASSE standard 1003 and CSA standard B360
Bestseller No. 19 
Watts 174A-3/4 Boiler Pressure Relief Valve, 3/4" Size
- Its used in water heater and hot water storage tank
- Size 3/4 inch
- Sold in each
SaleBestseller No. 20 
Relief Valve: The Plumber's Mate Mysteries, Book 2
- Audible Audiobook
- J. L. Merrow (Author) - Phillip Humphries (Narrator)
- English (Publication Language)
- 12/05/2020 (Publication Date) - Riptide Publishing (Publisher)
Editor’s Notes
We ranked and reviewed the top 20 Best boiler pressure relief valves in 2023. With the support of 55521 customer’s reviews, we hope that this article can give you the most realistic view of these products.
