Boiler System Accessories

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DOE Heating Capacity (BTU) Learn More
DOE Heating Capacity (BTU)
Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.
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Number of Zones Learn More
Number of Zones
A zone is a room or area within a building that has its own temperature control.
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Maximum Number of Zones
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Maximum Input Capacity (BTU) Learn More
Maximum Input Capacity (BTU)
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
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$717.00
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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 map apply, see our full shipping policy for more details.
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$321.00
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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 map apply, see our full shipping policy for more details.
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Electro Industries EB-ZTS-2 Quad to eight Zone Extender for EB-ZTS-1 and EB-ZES-1 Controllers
Item#: 18360
Model#: EB-ZTS-2
Brand: Electro Industries
$373.50
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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 map apply, see our full shipping policy for more details.
Factory-Direct
Triangle Tube - 1.25" Sweat System Connection - Timesaver Primary/Secondary Manifold - Includes Grundfos UPS 15-58 FC Circulator Pump - For Triangle Tube Challenger Solo and Challenger Combi Hot Water Boilers - MPN: CCRKIT202
Item#: 22954
Model#: CCRKIT202
Brand: Triangle Tube
$437.00
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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 map apply, see our full shipping policy for more details.
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Amtrol - FT-110-125 - 4.4 Gallon - Expansion Tank & Fill Valve Combination Kit - With 1-1/4" Purger & Vent - 1/2" NPT Connection - 2.5 Gallons Max Acceptance
Item#: 23070
Model#: FT-110-125
Brand: Amtrol
$187.00
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Amtrol - FT-111-125 - 7.4 Gallon - Expansion Tank & Fill Valve Combination Kit - With 1-1/4" Purger & Vent - 1/2" NPT Connection - 2.5 Gallons Max Acceptance
Item#: 23072
Model#: FT-111-125
Brand: Amtrol
$247.00
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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 map apply, see our full shipping policy for more details.
Factory-Direct
Triangle Tube Prestige Solo Boilers Replacement Gas Valve, NG
Item#: 23105
Model#: PGRKIT01
Brand: Triangle Tube
$217.00
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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 map apply, see our full shipping policy for more details.
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$373.00
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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 map apply, see our full shipping policy for more details.
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Triangle Tube PSSTND02 Wall Kit for Prestige PE110 and PS399 Boilers, Used with PSSTND03
Item#: 23115
Model#: PSSTND02
Brand: Triangle Tube
$543.00
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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 map apply, see our full shipping policy for more details.
Factory-Direct
Triangle Tube PSSTND03 Floor Stand for Prestige PE110 and PS399 Boilers, Used with PSSTND02
Item#: 23116
Model#: PSSTND03
Brand: Triangle Tube
$732.00
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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 map apply, see our full shipping policy for more details.
Factory-Direct