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 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 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 B163-89 Valve and Seat Assembly for 571-2 Zone Valves,
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Taco Z075T2-3 2-Way Zone Valve 24 VAC 3/4" FPT,
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Taco Zone Sentry Zone Valve enhances the overall performance of any zone valve system. The unique patented technology in the Zone Sentry utilizes a microcircuit based logic to control a gear driven electronic actuator which drives a ball valve based body design. All this adds up to a zone valve that leads the industry in energy efficiency, flow capacity (Cv), shutoff pressure rating, ease of installation, diagnostic capability and the number of valves that can be use on a standard 40VA transformer.

• The ball valve installs in any orientation
• Multi-function LED
• Quick connect wiring
• Manual override
• (90 deg turn) approximately 5 sec ball rotation speed
• 1 amp at 24 VAC end switch rating
• 0.5 amp heat anticipator setting
• Brass press ring and brass (chrome-plated)
• High performance engineered polymer body, high performance internally lubricated engineered polymer gears actuator
• 2-pin screw connectors for power and end switch

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Taco Zone Sentry zone valve enhances the overall performance of any zone valve system. The unique patented technology in the Zone Sentry utilizes a microcircuit based logic to control a gear driven electronic actuator which drives a ball valve based body design. All this adds up to a zone valve that leads the industry in energy efficiency, flow capacity (Cv), shutoff pressure rating, ease of installation, diagnostic capability and the number of valves (12) that can be use on a standard 40 VA transformer.

• Provide on-off, NO or NC control in closed hydronic systems
• Water or water/glycol up to 50% glycol close systems service
• 90 deg turn approximately 5 sec after charge time ball rotation speed
• 1 amp at 24 VAC end switch rating
• High performance internally lubricated engineered polymer gear
• Brass stem, press ring ball
• Modified teflon seat
• EPDM o-ring
• Uses up to 93% less energy than other commonly installed zone valves

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Taco Zone Sentry zone valve enhances the overall performance of any zone valve system. The unique patented technology in the Zone Sentry utilizes a microcircuit based logic to control a gear driven electronic actuator which drives a ball valve based body design. All this adds up to a zone valve that leads the industry in energy efficiency, flow capacity (Cv), shutoff pressure rating, ease of installation, diagnostic capability and the number of valves that can be use on a standard 40VA transformer.,
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Taco Z100C2-2 Sentury Zone Valve 1"

Taco 570 2 Way Zone Valve 1/2",

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Taco Z075T2-3 2-Way Zone Valve 24 VAC 3/4" FPT,
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Taco Z075T2-3