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-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-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 #:B146-22: Replaces Part #:'s : 21428,
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Taco B146-22

Grundfos ALPHA1 15-55 F Cast Iron High-Efficiency Circulator Pump, 1/16 The ALPHA1 is an energy efficient, variable-speed circulator built with reliable, electronically controlled Grundfos permanent magnet motor (ECM) technology, which has been used by Grundfos in the industry for more than 16 years. Featuring three-constant pressure control modes, an LED display and easy-to-use push butTon controls, the ALPHA1 is the perfect solution for domestic hydronic heating and hot water recirculation applications. Capable of replacing more than 30 other pump models, the ALPHA1 has the highest torque rating and most powerful start feature in its class. A magnetite resistant design, robust ceramic shaft and stainless steel bearing plate ensure that the ALPHA1 reliably delivers the optimal system flow at the lowest possible energy consumption.,
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Grundfos ALPHA1 15-55F

Armstrong Fluid Technology Astro-230ci 3-Speed Circulator Pump

• 1/25 HP
• 115 VAC
• 0 - 20 gpm
• Ceramic shaft and bearings
• Cross-reference information is printed on the box for convenient access
• E-coating on the inside of cast-iron volutes provides enhanced corrosion protection for improved reliability
• Flange-to-flange and bolt-to-bolt compatibility offers quick and easy exchange of competing models
• Plug-in terminal strip saves time
• High-flow check valve is pre-installed for convenience, where the installation does not call for a check valve, it can be removed in seconds
• Large wiring box and convenient plug-in terminal strip save time
• EPDM gasket
• Removable check valve installed at pump outlet
• Astro 2 circulators offer contractor friendly features for fast and convenient installation
• Wet rotor mechanical seal

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Armstrong Pumps ASTRO230CI

Watts AS-MB-100 Microbubble Air Separator, 1", IPS, 150 psig, 240 deg F, 15 gpm, Forged Brass, 3-12/16" L x 6-15/16" H

• Features a durable brass body construction, corrosion-resistant polyphenylsulfone coalescing media that withstands petroleum based cleaners, glycol anti-freeze
• Requires no minimum inlet/outlet piping length for proper operation
• DuoVent air vent assembly has a high-capacity and high-temperature rating
• Fully serviceable - can be disassembled for inspection and cleaning
• Bottom tapping for use with series RBFF residential boiler fill fitting

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Watts Water AS-MB100

Therma-Flow Parts AW-6 WELL Aquastat Well,
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Therma Flow Parts AW-6 WELL

Watts Water BD911S Bronze Combination Fill Valve Feeder and Backflow Preventer, 1/2" NPT

• Pre-assembled for ease of installation
• Push butTon fast fill with auto-stop to prevent system over-pressurization
• Dial indicator eliminates need for pressure gauge
• High capacity fill valve for quick system filling and purging
• All bronze body construction union solder x NPT connections
• Dial indicator plus or minus 2 psi
• Series BD911 combination fill valve and backflow preventer consists of a model 9D backflow preventer and model BD1156F feed water pressure regulator in one pre-assembled unit
• Combination bronze dial set fill valve

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Watts Water BD911S

Sid Harvey B131-13 High Pressure Gauge Glass, 14 Inch L x 5/8 Inch Dia, 6/Pack

• Useful in a variety of applications, including monitoring the amount of oil in tank
• Gauge glasses are required by the ASME boiler and pressure code on steam boilers
• Allows the liquid level in any vessel to be visually inspected
• These sets and accessories fit the vast majority of steam boilers

Sid Harvey Item #:B131-12: Replaces Part #:'s : 15228,
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Sid Harvey B131-13

Sid Harvey B131-12 High Pressure Gauge Glass, 12 Inch L x 5/8 Inch Dia, 6/Pack

• Useful in a variety of applications, including monitoring the amount of oil in tank
• Gauge glasses are required by the ASME boiler and pressure code on steam boilers
• Allows the liquid level in any vessel to be visually inspected
• These sets and accessories fit the vast majority of steam boilers

Sid Harvey Item #:B131-12: Replaces Part #:'s : 15228,
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Sid Harvey B131-12