Taco Flo-Checks prevent gravity circulation in forced hot water heating systems during periods when the boiler is hot, but the space heating zone is not wanted. This makes it possible to use the heating boiler to maintain domestic hot water year-round. You can also use Flo-Checks in systems with multiple circulator zones to allow heat to flow only into the zones that are calling for heat. In addition, the thumb screw can be opened manually for gravity feed applications, if the main circulator stops operating.

• In systems with multiple circulator zones to allow heat to flow only into the zones that are calling for heat
• Feature a thumb screw to manually open the valve and are available in a cast iron universal body and a bronze sweat in-line configuration
• The thumb screw can be opened manually for gravity feed applications, if the main circulator stops operating
• Open automatically when the circulator starts running, when the room thermostat is satisfied and the circulator is stopped, the flo-checks close immediately, preventing gravity circulation
• Water or glycol media

Sid Harvey Item #:B146-21: Replaces Part #:'s : 4031,
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Taco B146-21

Taco flo-cheks have dependably stopped gravity circulation in forced hot water heating systems for over 40 years. Flo-cheks open automatically when the circulator starts running. They feature a thumb screw to manually open the valve and are available in a cast iron universal body and a bronze sweat in-line configuration.

• Flo-cheks allow heat to flow only into the zones that are calling for heat
• Thumb screw can be manually opened for gravity feed applications if the main circulator stops operating
• Taco flo-cheks open automatically when the circulator starts running

Sid Harvey Item #:B146-20: Replaces Part #:'s : HYD160-B146-20 | 4030 |,
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Taco B146-20

Taco flo-cheks have dependably stopped gravity circulation in forced hot water heating systems for over 40 years. Flo-cheks open automatically when the circulator starts running. They feature a thumb screw to manually open the valve and are available in a cast iron universal body and a bronze sweat in-line configuration.

• Flo-cheks allow heat to flow only into the zones that are calling for heat
• Thumb screw can be manually opened for gravity feed applications if the main circulator stops operating
• Taco flo-cheks open automatically when the circulator starts running

Sid Harvey Item #:B146-19: Replaces Part #:'s : 21426,

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Taco B146-19

Pardi EVA Vacuum Adapter Eliminator

Pardi EVA

Watts Regulators series LFN36 lead free water service VAC uum relief valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent VAC uum conditions that could siphon the water from the system and damage water heater/tank equipment. It consists of a lead free brass body construction with NPT male inlet connection, and a protective cap. Series LFN36 has a low profile design, is tested and rated to ANSI Z21.22, and is CSA certified. It is suitable for low pressure steam and water service, and is ideal for use in domestic water heaters and supply tanks, table top heaters, jacketed steam kettles, unit heaters, low pressure steam systems, and steam coil heaters.

• Protective cap for automatic venting of a closed system to atmosphere when a VAC uum is created
• Suitable for low pressure steam and water service
• Permits air to enter and prevent VAC uum conditions that could siphon the water from the system, resulting in collapse of a tank or water heater or equipment burn out
• 302 stainless steel spring
• Polysulfone glass filled float
• Polypropylene cover
• 200 psi maximum working pressure

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Watts Regulators series LFN36 lead free water service VAC uum relief valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent VAC uum conditions that could siphon the water from the system and damage water heater/tank equipment. It consists of a lead free brass body construction with NPT male inlet connection, and a protective cap. Series LFN36 has a low profile design, is tested and rated to ANSI Z21.22, and is CSA certified. It is suitable for low pressure steam and water service, and is ideal for use in domestic water heaters and supply tanks, table top heaters, jacketed steam kettles, unit heaters, low pressure steam systems, and steam coil heaters.

• Protective cap for automatic venting of a closed system to atmosphere when a VAC uum is created
• Suitable for low pressure steam and water service
• Permits air to enter and prevent VAC uum conditions that could siphon the water from the system, resulting in collapse of a tank or water heater or equipment burn out
• 302 stainless steel spring
• Polysulfone glass filled float
• Polypropylene cover
• 200 psi maximum working pressure

Sid Harvey Item #:N36-3/4: Replaces Part #:'s : R54-739,
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Honeywell Home HPZC103 Valve Controller 3-Zone

Watts LF70A-RK Valve Repair Kit For LF70A, LF70AT Hot Water Extender Tempering Valve Reduced Pressure Detector, 1/2 - 3/4"

• For standard temperature thermostat
• o-ring to prevent leaks

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Watts Water LF70A-RK

Watts Regulator lead free series LF150A water hammer arrestors are used in residential applications to control water pressure shock and prevent water hammer conditions. It consists of a pre-charged air chamber that is rechargeable, an air-tight sealing cap, standard tire valve connection for easy charging, stainless steel top, sealed-in diaphragm, lower stainless steel chamber, and brass hex adapter for easy installation. It can be installed in new or existing plumbing systems in any angle. Series LF150A is ideal for dishwashers, clothes washers, and quick-closing faucets.

• Pre-charged air chamber
• Sealed in diaphragm
• Complete stainless steel chamber construction
• Rechargeable

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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

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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
• 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 #:174A-1-30: Replaces Part #:'s : 24565
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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

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