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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
  • Water or water/glycol media
Sid Harvey Item #:241: Replaces Part #:'s : 21431,
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Item#:
241
Manufacturer Item:
241-4
Manufacturer:
TACO INC.
Taco 222-2 Flo-Check Valve 1-1/2",
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Item#:
222-2
Manufacturer Item:
222-6
Manufacturer:
TACO INC.
Weil-McLain Heating Parts 383500600 Flue Temperature Sensor
Item#:
383500600
Manufacturer Item:
383-500-600
Manufacturer:
WEIL-MCLAIN
Caleffi Z-One Z45 Forged Brass 2-Way 2-Position Normally Closed Motorized Zone Valve, 3/4", Sweat
  • Zone valve are used to automatically shut-off the flow or redirect hot and chilled water in hydronic systems, open systems, closed systems, low-pressure steam
  • 2-position, on/off, spring return actuator has an end mounted push butTon for quick installation to the valve body
  • Zone valve provides 100% bubble-tight seat close-off leakage
  • The high temperature and high close-off performance characteristics of these zone valves, combined with the compact size, makes them suitable to fit inside baseboards or directly in fan coil units
  • The actuator is equipped with auxiliary micro-switch and are normally closed with 18" wire lead connections
  • 0 - 0.4 amp at 24 VAC auxiliary micro-switch contact rating
  • Less than 60 sec full on stroke, 6 seconds full off stroke
  • Polycarbonate base and cover, aluminum base plate actuator
  • (2) O-ring seals and EPDM paddle
  • Includes: Z111000 with auxiliary switch, 18" wire connection, Z200537 sweat body
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Item#:
Z45
Manufacturer Item:
Z45
Manufacturer:
CALEFFI NORTH AMERICA, INC.
Tekmar TEKMAR-482 Gate-Way TN4 120 VAC RS232,
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Item#:
TEKMAR-482
Manufacturer Item:
TEK-482
Manufacturer:
TEKMAR
Safgard 400 Galvanized Housing Glazed Probe Insulator Non-Cycling Steam Primary Low Water Cut-Off 24 VAC 15 psi Automatic Reset
  • Low maintenance - no moving parts to wear or hang up, as in float devices
  • Advanced solid state design - high quality, economical boiler protection
  • Delayed burner shutdown - 15 sec off-time delay in low water condition prevents burner short cycling due to surging and priming
  • Probe plus 30 - 30 sec on-time delay allows solenoid valves and automatic feeders to bring feed water past the probe to a safe operating level
  • Automatic reset - automatically restarts the boiler after 30 sec on-time delay when water reaches the probe
  • Low water indicating light
  • Direct boiler mounting - eliminates blowdowns
  • SPDT switch contacts
  • NEMA 1 control housing
Sid Harvey Item #:B103-39: Replaces Part #:'s : 9916,
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Hydrolevel B103-39

Item#:
B103-39
Manufacturer Item:
45-400
Manufacturer:
HYDROLEVEL COMPANY
Head Gasket Domestic
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Item#:
CO-12
Manufacturer Item:
302600
Manufacturer:
XYLEM INC.
Resideo L4006E1125 High Limit Aquastat 100-200°F Manual Reset,
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Item#:
L4006E1125
Manufacturer Item:
L4006E1125
Manufacturer:
HONEYWELL
Aquastat controllers are immersion type devices for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required. Honeywell's L4006 are used in applications that utilize the existing wells.
  • Totally enclosed micro switch snap-acting switches operate on temperature rise to setpoint
  • Visible control point scale and external adjustments screw permit easy setting
  • Direct or well immersion of the sensing element
  • Remote bulb model may be used to sense air temperature in ducts and in outside air sensing applications
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Item#:
L4080B-1352
Manufacturer Item:
21575
Manufacturer:
HONEYWELL
Honeywell R80-30 High Limit Immersion Aquastat Control 110 - 220 Degrees Honeywell R8182D1079/U,
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Item#:
R80-30
Manufacturer Item:
R8182D1079
Manufacturer:
HONEYWELL
Honeywell R80-40 High Limit Immersion Aquastat Control 110-220 Degrees Low/130-240 Degrees,
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Item#:
R80-40
Manufacturer Item:
R8182H1070
Manufacturer:
HONEYWELL
Resideo L4006H1004 High Limit Strap-On Aquastat 100-240 Manual Reset,

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Item#:
L4006H1004
Manufacturer Item:
L4006H1004
Manufacturer:
HONEYWELL
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