Expansion Tanks

21 Products
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A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab.
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Amtrol - EX-90 - 14 Gallon - In-Line Boiler System Expansion Tank - 1/2" NPT Connection - 11.3 Gallons Max Acceptance
Item#: 45583
Model#: EX-90
Brand: Amtrol
$225.00
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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.
In-Stock
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
In-Stock
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
Free Shipping
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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
Amtrol - SX-30V - 14 Gallon - Vertical Boiler System Expansion Tank - 1" NPT Connection - 11.3 Gallons Max Acceptance
Item#: 45584
Model#: SX-30V
Brand: Amtrol
$261.35
Free Shipping
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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.
In-Stock
Amtrol - SX-40V - 20 Gallon - Vertical Boiler System Expansion Tank - 1" NPT Connection - 11.3 Gallons Max Acceptance
Item#: 45588
Model#: SX-40V
Brand: Amtrol
$299.09
Free Shipping
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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.
In-Stock
Amtrol - SX-60V - 32 Gallon - Vertical Boiler System Expansion Tank - 1" NPT Connection - 11.3 Gallons Max Acceptance
Item#: 45589
Model#: SX-60V
Brand: Amtrol
$419.92
Free Shipping
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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.
In-Stock
Amtrol - SX-90V - 44 Gallon - Vertical Boiler System Expansion Tank - 1-1/4" NPT Connection - 34 Gallons Max Acceptance
Item#: 45593
Model#: SX-90V
Brand: Amtrol
$759.00
Free Shipping
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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.
Free Lift Gate
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Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
Amtrol - SX-110V - 62 Gallon - Vertical Boiler System Expansion Tank - 1-1/4" NPT Connection - 34 Gallons Max Acceptance
Item#: 45594
Model#: SX-110V
Brand: Amtrol
$908.00
Free Shipping
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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.
Free Lift Gate
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Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
Amtrol - SX-160V - 86 Gallon - Vertical Boiler System Expansion Tank - 1-1/4" NPT Connection - 46 Gallons Max Acceptance
Item#: 45597
Model#: SX-160V
Brand: Amtrol
$959.00
Free Shipping
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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.
Free Lift Gate
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Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain - Expansion Tank Package - for CG-6-8 Boilers - 381354521
Item#: 49613
Model#: 381354521
Brand: Weil-McLain
$268.00
Free Shipping
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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
Weil-McLain - Expansion Tank Package - for GV-6 - 382200425
Item#: 49616
Model#: 382200425
Brand: Weil-McLain
$231.00
Free Shipping
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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