Thermostatic Boiler Controls

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Learn More About Tekmar M3051
tekmar - M3051 - Fuses - 1.25 A 250V (AC) - Quantity: 5
$47.00
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Learn More About Tekmar M3052
tekmar - M3052 - Fuses - 15 A 250V (AC) - Quantity: 5
$44.00
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Learn More About Tekmar M3057
tekmar - M3057 - 1-1/2" to 2" - O-Ring Kit - For tekmar Brass Mixing Valves
$35.00
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Learn More About Taco SR502-4
Taco - SR502-4 - Zone Switching Relay - Two Zones - 1 Priority Zone
$171.51
In-Stock
Learn More About Weil-McLain 383600304
Weil-McLain - UPC BACnet Converter - For Weil-McLain SlimFit Hot Water Boilers - MPN: 383600304
$1,980.00
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Learn More About Honeywell L7224U1002
$241.00
In-Stock
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Taco SR504-4
Taco - SR504-4 - Zone Switching Relay - Four Zones - 1 Priority Zone
$224.52
Only 1 In-Stock
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Caleffi ZSR104
$238.97
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Caleffi ZSR106
$292.65
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Caleffi ZVR106
$238.97
In-Stock
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Hydrolevel 48-121
Hydrolevel HydroStat Pipe Mounting Kit, 4' Sensor Cord
$109.00
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Learn More About Hydrolevel 48-104
Hydrolevel HydroStat Wall/Jacket Mounting Kit, 20' Sensor Cord
$95.00
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Learn More About Hydrolevel 48-102
Hydrolevel HydroStat Wall/Jacket Mounting Kit, 4' Sensor Cord
$69.00
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Learn More About Triangle Tube PGRKIT20
Triangle Tube PS110, PE110 Low-Water Cut-Off for Hot Water Boilers
$81.00
In-Stock
Learn More About Honeywell HPSR106
$321.00
In-Stock
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Tekmar 256
tekmar - Classic Series - 256 - Boiler Control - Outdoor Temperature Reset - One Stage
$227.00
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Tekmar 552
tekmar - Designer Series - 552 - Thermostat - 7-Day Programmable - Compatible with tekmarNet 2 and tekmarNet 4 - One Stage Heat - Touchscreen
$269.00
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Tekmar 260
tekmar - Classic Series - 260 - Boiler Control - Outdoor Temperature Reset - One Stage - Domestic Hot Water
$548.00
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Learn More About Tekmar 403
tekmar - Performance Series - 403 - House Control - Compatible with tekmarNet 2 - Four Zone Pumps - Outdoor Temperature Reset - Boiler - DHW - Setpoint - Mixing
$1,011.00
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.