Watts Regulators series 740 boiler pressure relief valves are used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of a iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 740 offers large discharge capacity, resists corrosive water conditions, resists 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.

Iron body with expanded outlets for hot water space heating boilers
• Seat located above drain, water can't be trapped and sediment can't foul seat
• Non-mechanical seat-to-disc alignment will not stick or freeze
• Each hot water space heating boiler shall be equipped with a pressure relief valve set to relieve below the maximum boiler working pressure
• Water seal of high temperature resisting material isolates spring working parts from water during relief
  
  

  Watts Water B145-6

Watts Regulator series 374A boiler pressure relief valves are used in hot water boiler applications to protect against excessive pressure on all types of hot water heating boiler equipment. It consists of an iron body construction with forged bronze inlet connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 374A 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.

Watts Water B145-9

Watts Regulators series 740 boiler pressure relief valves are used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of a iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 740 offers large discharge capacity, resists corrosive water conditions, resists 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.

Iron body with expanded outlets for hot water space heating boilers
• Seat located above drain, water can't be trapped and sediment can't foul seat
• Non-mechanical seat-to-disc alignment will not stick or freeze
• Water seal of high temperature resisting material isolates spring working parts from water during relief
  
  

  Watts Water B145-5

Watts Regulators series 174A 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.

Watts Water B145

Watts Regulator series 374A boiler pressure relief valves are used in hot water boiler applications to protect against excessive pressure on all types of hot water heating boiler equipment. It consists of an iron body construction with forged bronze inlet connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 374A 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.

Iron body with forged brass inlet
• Seat located above drain, water cant be trapped and sediment cant foul seat
• Non-mechanical seat-to-disc alignment will not stick or freeze
• Each hot water space heating boiler shall be equipped with a pressure relief valve set to relieve below the maximum boiler working pressure
• Non-metallic disc-to-metal seating
• Bronze inlet wetted parts
  
  

  Watts Water B145-9A

Watts Water 0342692 M335-M2 Bronze 2-Port Pressure Safety Relief Valve, 3/4", MNPT x FNPT, 30 psi Watts Regulator series 335 ASME rated boiler pressure relief valves were developed to fill the OEM need of the hydronic industry for a smaller valve on popular size boilers up to 510000 BTU at 30 psi. The compact design, all bronze construction and modern appearance make them an ideal choice for a wide variety of smaller size OEM boilers. ASME section IV at 30 psi set point.

Watts Water 0342692

Watts regulator series 335 ASME rated boiler pressure relief valves were developed to fill the OEM need of the hydronic industry for a smaller valve on popular size boilers up to 510000 BTU at 30 psi. The compact design, all bronze construction and modern appearance make them an ideal choice for a wide variety of smaller size OEM boilers. ASME section IV at 30 psi set point.

Watts Water 0342691

Apollo Valves® has three state-of-the-art manufacturing facilities in the Carolinas, including two world-class foundries, allowing the production of dependable products using high-quality materials such as cast bronze, forged brass, cast steels, stainless steel, alloy 20, and other exotic alloys. Over 90% of the 30,000 Apollo Valves shipped daily are made in the USA, with every valve factory-tested and backed by a 5-year warranty. The extensive distribution center network ensures timely delivery of products, no matter where you are. This is the Apollo advantage.
key features

high-quality materials: cast bronze, forged brass, cast steels, stainless steel, alloy 20, and other exotic alloys.

made in America: over 90% of valves are manufactured in the USA, ensuring high quality and reliability.

extensive product testing: every valve produced is 100% factory-tested.

5-year warranty: backing every valve for confidence and reliability.

diverse market applications: suitable for residential, commercial, institutional, and industrial sectors.

extensive distribution network: ensures timely delivery of products.

Apollo Valves 10-408-05 Bronze Safety Relief Valve, 3/4", FNPT x FHPT 30 psig

Corrosion resistant construction

Standard stainless steel spring

Made in USA

Apollo Valves 10-408-05

Apollo Valves® has three state-of-the-art manufacturing facilities in the Carolinas, including two world-class foundries, allowing the production of dependable products using high-quality materials such as cast bronze, forged brass, cast steels, stainless steel, alloy 20, and other exotic alloys. Over 90% of the 30,000 Apollo Valves shipped daily are made in the USA, with every valve factory-tested and backed by a 5-year warranty. The extensive distribution center network ensures timely delivery of products, no matter where you are. This is the Apollo advantage.
key features

high-quality materials: cast bronze, forged brass, cast steels, stainless steel, alloy 20, and other exotic alloys.

made in America: over 90% of valves are manufactured in the USA, ensuring high quality and reliability.

extensive product testing: every valve produced is 100% factory-tested.

5-year warranty: backing every valve for confidence and reliability.

diverse market applications: suitable for residential, commercial, institutional, and industrial sectors.

extensive distribution network: ensures timely delivery of products.

Apollo Valves 10-407-05 Bronze Safety Relief Valve, 3/4", MNPT x FNPT, 30 psig

Corrosion resistant construction

Standard stainless steel spring

Made in USA

Apollo Valves 10-407-05

Watts Water 740 Pressure Relief Valve, 3/4", FNPT, 30 psi, Iron

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Watts Water 740-3/4-1-30

Watts Regulators series 740 boiler pressure relief valves are used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of a iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 740 offers large discharge capacity, resists corrosive water conditions, resists 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.

Iron body with expanded outlets for hot water space heating boilers
• Seat located above drain, water can't be trapped and sediment can't foul seat
• Non-mechanical seat-to-disc alignment will not stick or freeze
• Each hot water space heating boiler shall be equipped with a pressure relief valve set to relieve below the maximum boiler working pressure
• Water seal of high temperature resisting material isolates spring working parts from water during relief
  
  

  Watts Water 740-3/4-50