Water Heater Expansion Tanks

Amtrol 3/4" NPT Connection 3.2 Gallons Max Acceptance
Item#: 81418
Model#: ST-12C-DD
Brand: Amtrol
$1,519.00
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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.
In-Stock
$1,784.00
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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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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 3/4" NPT Connection 0.9 Gallons Max Acceptance
Item#: 81417
Model#: ST-5C-DD
Brand: Amtrol
$1,164.00
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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 1-1/4" NPT Connection 34 Gallons Max Acceptance
Item#: 81421
Model#: ST-80VC
Brand: Amtrol
$3,681.00
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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.
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 4.4 Gallon In-Line Thermal Expansion Tank 3/4" NPT 3.2 Gall Max
Item#: 23185
Model#: T-12
Brand: Amtrol
$159.00
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 2 Gallon In-Line Thermal Expansion Tank 3/4" NPT 0.9 Gall Max
Item#: 23186
Model#: T-5
Brand: Amtrol
$149.99
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 10.3 Gallon Vertical Thermal Expansion Tank 3/4" NPT 10.3 Gall
Item#: 45598
Model#: ST-25V
Brand: Amtrol
$306.00
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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 14 Gallon Vertical Thermal Expansion Tank 3/4" NPT 11.3 Gall
Item#: 45599
Model#: ST-30V
Brand: Amtrol
$381.00
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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 20 Gall Vertical Thermal Expansion Tank 3/4" NPT 11.4 Gall
Item#: 45601
Model#: ST-42V
Brand: Amtrol
$458.00
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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 44 Gall Vert Thermal Expansion Tank 1-1/4" NPT 33.9 Gall Max
Item#: 45605
Model#: ST-80V
Brand: Amtrol
$802.00
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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.
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
Amtrol 62 Gall Vertical Thermal Expansion Tank 1-1/4" NPT 34.1 Gall
Item#: 45606
Model#: ST-180V
Brand: Amtrol
$935.00
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
Amtrol 3/4" NPT Connection 11.4 Gallons Max Acceptance
Item#: 81420
Model#: ST-42VC
Brand: Amtrol
$1,987.00
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.
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Amtrol 3/4" NPT Connection 3.2 Gallons Max Acceptance
Item#: 81422
Model#: ST-20VC
Brand: Amtrol
$1,600.00
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
Learn More
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.
Sold Out