Brand Name
Type
Inlet Size
Outlet Size
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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.
Item#:
0342691
Manufacturer Item:
335M2 30LB
Manufacturer:
WATTS REGULATOR CO
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.
Item#:
0342692
Manufacturer Item:
M335M2 30LB
Manufacturer:
WATTS REGULATOR CO
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
Item#:
B145-9
Manufacturer Item:
0358553
Manufacturer:
WATTS REGULATOR CO
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
Sid Harvey Item #:B145-9A: Replaces Part #:'s : B145-9A
Item#:
B145-9A
Manufacturer Item:
0353030
Manufacturer:
WATTS REGULATOR CO
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.
  • Safety relief valves for pressure protection only of all types of hot water heating boiler equipment
  • Seat located above drain, water cant be trapped and sediment cant 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
Sid Harvey Item #:B145: Replaces Part #:'s : 24575
Item#:
B145
Manufacturer Item:
0274428
Manufacturer:
WATTS REGULATOR CO
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
Sid Harvey Item #:10-408-05: Replaces Part #:'s : 27621
Item#:
10-408-05
Manufacturer Item:
10-408-05
Manufacturer:
CONBRACO INDUSTRIES INC
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
Sid Harvey Item #:10-407-05: Replaces Part #:'s : 27620
Item#:
10-407-05
Manufacturer Item:
10-407-05
Manufacturer:
CONBRACO INDUSTRIES INC
Watts Water 740 Pressure Relief Valve, 3/4", FNPT, 30 psi, Iron
Item#:
740-3/4-1-30
Manufacturer Item:
0382008
Manufacturer:
WATTS REGULATOR CO
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
Item#:
740-3/4-50
Manufacturer Item:
0382328
Manufacturer:
WATTS REGULATOR CO
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
Sid Harvey Item #:B145-5: Replaces Part #:'s : 35699
Item#:
B145-5
Manufacturer Item:
0382570
Manufacturer:
WATTS REGULATOR CO
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
Sid Harvey Item #:B145-6: Replaces Part #:'s : 24603
Item#:
B145-6
Manufacturer Item:
0383020
Manufacturer:
WATTS REGULATOR CO
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. Pressure Range: 30 to 75psi (2 to 5 bar) with corresponding high ratings from 925,000 to 10,700,000 BTU.
  • 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
  • Non-metallic disc-to-metal seating
  • The discharge line must be the same size as the valve outlet and must pitch downward from the valve to a safe place for disposal
  • Valve lever must be tripped at least once a year to ensure that waterways are clear, this device is designed for emergency safety relief and shall not be used as an operating control
Item#:
740-3/4-30
Manufacturer Item:
0382008
Manufacturer:
WATTS REGULATOR CO
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