Therm-X-Trol Expansion Tanks for Potable Water

Hot water expansion tank absorbs the expanded drinking (domestic) hot water produced by the water heater and prevents excessive stress on internal plumbing system components and frequent discharge of the pressure relief valve.
We offer a wide range of hot water heater expansion tanks - from small residential (system mount) to large floor standing commercial models.
Both Amtrol (diaphragm type) and Calefactio (bladder type) are great quality tanks, which come factory pre-charged and are NSF certified for potable water applications.
We also stock an extensive selection of Well-X-Trol well water expansion tanks.
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HGSC-SS Wall Mount Bracket & Service Center for Thermal Expansion Tanks Calefactio
$57.95 / each
Therm-X-Trol ST-5 Thermal Expansion Tank w/ InSight Indicator (2.0 Gal Volume) Amtrol
Therm-X-Trol ST-5 Thermal Expansion Tank w/ InSight Indicator (2.0 Gal Volume)
Part#: 140N43 Brand: Amtrol
In Stock
Pick Up and save $4.00
(5)
$58.95 / each
$223.80 box of 4 + Free Shipping
($55.95 each)
#5 Thermal Expansion Tank (2.1 Gal Volume) Calefactio
#5 Thermal Expansion Tank (2.1 Gal Volume)
Part#: HGTE-5 Brand: Calefactio
In Stock
Pick Up and save $4.00
(3)
$39.95 / each
$151.80 box of 4 + Free Shipping
($37.95 each)
#8 Thermal Expansion Tank (3.2 Gal Volume) Calefactio
#8 Thermal Expansion Tank (3.2 Gal Volume)
Part#: HGTE-8 Brand: Calefactio
In Stock
Pick Up and save $5.00
(1)
$55.95 / each
$215.80 box of 4 + Free Shipping
($53.95 each)
Therm-X-Trol ST-12 Thermal Expansion Tank w/ InSight Indicator (4.4 Gal Volume) Amtrol
Therm-X-Trol ST-12 Thermal Expansion Tank w/ InSight Indicator (4.4 Gal Volume)
Part#: 141N43 Brand: Amtrol
In Stock
Pick Up and save $6.00
(3)
$81.95 / each
$311.80 box of 4 + Free Shipping
($77.95 each)
#12 Thermal Expansion Tank (4.7 Gal Volume) Calefactio
#12 Thermal Expansion Tank (4.7 Gal Volume)
Part#: HGTE-12 Brand: Calefactio
In Stock
Pick Up and save $6.00
$66.95 / each
$255.80 box of 4 + Free Shipping
($63.95 each)
Therm-X-Trol ST-25V Thermal Expansion Tank (10.3 Gal Volume) Amtrol
Therm-X-Trol ST-25V Thermal Expansion Tank (10.3 Gal Volume)
Part#: 143N164 Brand: Amtrol
In Stock
Pick Up and save $18.00
$260.95 / each
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#25 Thermal Expansion Tank (8.0 Gal Volume) Calefactio
#25 Thermal Expansion Tank (8.0 Gal Volume)
Part#: HGTE-25 Brand: Calefactio
In Stock
Pick Up and save $18.00
$122.95 / each
Free Shipping on any qty
Therm-X-Trol ST-30V Thermal Expansion Tank (14.0 Gal Volume) Amtrol
Therm-X-Trol ST-30V Thermal Expansion Tank (14.0 Gal Volume)
Part#: 143N273 Brand: Amtrol
In Stock
Pick Up and save $22.00
$330.95 / each
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Therm-X-Trol ST-42V Thermal Expansion Tank (20.0 Gal Volume) Amtrol
Therm-X-Trol ST-42V Thermal Expansion Tank (20.0 Gal Volume)
Part#: 144N177 Brand: Amtrol
In Stock
Pick Up and save $26.00
(1)
$395.95 / each
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Therm-X-Trol ST-60V Expansion Tank (34.0 Gal Volume) Amtrol
Therm-X-Trol ST-60V Expansion Tank (34.0 Gal Volume)
Part#: 147N130 Brand: Amtrol
In Stock
Pick Up and save $36.00
$545.95 / each
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Therm-X-Trol ST-80V Expansion Tank (44.0 Gal Volume) Amtrol
Therm-X-Trol ST-80V Expansion Tank (44.0 Gal Volume)
Part#: 147N131 Brand: Amtrol
In Stock
Pick Up and save $100.00
(1)
$775.95 / each
Free Shipping on any qty
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