Water Heater Expansion Tanks

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Learn More About ProFlo PFXT5I
ProFlo
3/4" Stainless Steel NPTM Connection - 0.45 Gallons Max Acceptance
57% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$40.00
In-Stock
Learn More About Amtrol ST-25V
3/4" NPT Connection - 10.3 Gallons Max Acceptance
11% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$306.00
In-Stock
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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 may apply, see our full shipping policy for more details.
Learn More About Amtrol ST-30VC-DD
3/4" NPT Connection - 11.3 Gallons Max Acceptance
11% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$1,784.00
In-Stock
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Free Shipping & Lift Gate
Learn More About Free Freight
Free Shipping & Lift Gate
*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 Icon
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 Amtrol ST-5C-DD
3/4" NPT Connection - 0.9 Gallons Max Acceptance
6% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$1,164.00
In-Stock
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Free Shipping
Learn More About Free Freight
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 Icon
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 Amtrol ST-12C-DD
3/4" NPT Connection - 3.2 Gallons Max Acceptance
6% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$1,519.00
In-Stock
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Free Shipping
Learn More About Free Freight
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 Icon
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 ProFlo PFXT12I
ProFlo
3/4" Stainless Steel NPTM Connection - 0.73 Gallons Max Acceptance
6% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$48.00
In-Stock
Learn More About Amtrol ST-30V
3/4" NPT Connection - 11.3 Gallons Max Acceptance
3% Buy This
Comfort Cash Earn up to 10% back in Comfort Cash
$381.00
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
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.
Learn More About Amtrol ST-5
3/4" NPT Connection - 0.9 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$66.00
In-Stock
Learn More About Amtrol ST-60V
1-1/4" NPT Connection - 34 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$596.00
In-Stock
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Free Shipping
Learn More About Free Freight
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.
Learn More About Amtrol ST-42V
3/4" NPT Connection - 11.4 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$458.00
In-Stock
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Free Shipping
Learn More About Free Freight
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.
Learn More About Amtrol ST-12
3/4" NPT Connection - 3.2 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$91.00
In-Stock
Learn More About Amtrol ST-80VC
1-1/4" NPT Connection - 34 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$3,681.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
Free Shipping & Lift Gate
*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 Icon
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 Amtrol ST-80V
1-1/4" NPT Connection - 33.9 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$802.00
Factory-Direct
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Free Shipping & Lift Gate
Learn More About Free Freight
Free Shipping & Lift Gate
*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 Amtrol ST-180V
1-1/4" NPT Connection - 34.1 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
$935.00
Factory-Direct
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
Free Shipping & Lift Gate
*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 Amtrol ST-42VC
3/4" NPT Connection - 11.4 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
Sold Out
Learn More About Amtrol ST-20VC
3/4" NPT Connection - 3.2 Gallons Max Acceptance
Comfort Cash Earn up to 10% back in Comfort Cash
Sold Out