Watts Regulator series 53L pressure relief valves are used in residential applications to protect against excessive pressure on domestic storage tanks and tankless water heaters. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, stainless steel spring, and test lever.

• Used for protection against excessive pressure on domestic storage tanks or tankless water heaters
• Furnished with test levers
• Relieves excessive pressure on storage tanks and tankless water heaters
• Compatible with model 210 gas shutoff valves

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Watts Water 53L12-175

Watts Regulator series 53L pressure relief valves are used in residential applications to protect against excessive pressure on domestic storage tanks and tankless water heaters.

• Used for protection against excessive pressure on domestic storage tanks or tankless water heaters
• Furnished with test levers
• Relieves excessive pressure on storage tanks and tankless water heaters
• Compatible with model 210 gas shutoff valves
• Stainless steel spring

Sid Harvey Item #:B145-22: Replaces Part #:'s : 2K411
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Watts Regulator series 3L pressure relief valves are used in residential applications to protect against excessive pressure on domestic storage tanks, tankless water heaters, and solar heating applications. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, stainless steel spring, and test lever.

• Used for protection against excessive pressure on domestic storage tanks or tankless water heaters
• Popularly used in conjunction with the model 210 gas shutoff valve on gas water heaters to shut off gas to heater if water heater temperature exceeds 210 deg F
• Furnished with test levers
• Relieves excessive pressure on storage tanks and tankless water heaters
• Compatible with model 210 gas shutoff valves
• Stainless steel spring

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Watts Water B145-23

Watts 111L Brass Poppet Pressure Relief Valve, 1/2", MNPT x FNPT, 125 psi

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111L

Watts Water 0009820 Pressure Regulator 2-Way 1/2" 10-125 psi Lead Free

0009820

Watts Regulators series B1156F bronze high capacity feed water pressure regulators are for use in commercial and residential hydronic heating systems to fill the boiler and piping system with water, and to maintain water pressure in the system at all times. It also provides make-up water to the system in the event of system leaks. It consists of a bronze body construction with NPT threaded inlet and outlet connections, a tight seating check valve, purge lever for manual purging, and a stainless steel strainer. Series B1156F has high capacity performance and simplified servicing design. It is suitable for use in the boiler feed lines of hydronic heating systems.

• Tight seating check valve
• Purge lever for manual purging
• High capacity performance as well as unique simplified servicing accessibility for complete unitized maintenance
• Stainless steel strainer to protect the valve disc from fouling
• Designed to fill the boiler and system piping with water and to maintain water pressure in the system at all times
• Provide make up water to the system in the event of system leaks
• 15 psi factory set, 100 psi maximum working pressure

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Watts Water B1156F

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 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 #:B145-2: Replaces Part #:'s : 24572
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B145-2

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,
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B145-6

Watts Water LF530-C-1/2 Pressure Relief Valve 1/2",
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LF530-C-1/2

Watts Regulators series 530C calibrated pressure relief valves are used in commercial, residential and industrial applications to protect against excessive pressure in systems containing water, oil, or air. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, stainless steel spring, brass bonnet, buna-N disc and buna-N o-ring. Series 530C has a calibrated adjustment feature for setting the valve to the required relief pressure, and is ideal for by-pass thermal expansion pressure relief.

• Valves are spring operated brass valves designed for use only as protection from the build up of excessive pressure in systems containing water, oil or air
• Incorporate a calibrated adjustment feature for setting the valve to the relief pressure required
• Adjustable stainless steel spring
• Buna-N disc on machined body seat
• Should not be used in system application
• Brass bonnet, spring washer and disc holder

Sid Harvey Item #:B145-20: Replaces Part #:'s : 5G4002,
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Watts Water B145-20

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,

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Watts Water B145-5

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.
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Watts Water 0342692