Thermal & Hydronic Expansion Tanks
Manage pressure safely with our expansion tanks. Thermal expansion tanks are designed to absorb excess water volume caused by thermal expansion in closed potable hot water systems, helping to also prevent pressure buildup and damage. Hydronic expansion tanks are used with boilers in hot water heaters and systems to relieve built-up pressure and maintain safe, efficient operation.
Sold OutRegular price $44.64 Unit priceUnit price /UnavailableSold outPart #: T-5
Sold OutFlexcon Industries
Regular price $59.75 Unit priceUnit price /UnavailableSold outPart #: PH5
Sold OutRegular price $65.80 Unit priceUnit price /UnavailableSold outPart #: T-12
![Neo-Pure Thermal Expansion Tank 0.52 gal [2 Liter] 3/4 MNPT - Black](//www.freshwatersystems.com/cdn/shop/files/qlw22olwbejy26u7ouum.jpg?v=1764842467&width=460)
Regular price From $27.78 Unit priceUnit price /UnavailablePart #: TET-02LE
Save up to 8% with bulk pricing
Sold OutFlexcon Industries
Regular price $77.08 Unit priceUnit price /UnavailableSold outPart #: PH12
Regular price $26.49 Unit priceUnit price /UnavailablePart #: TET-021
![Neo-Pure Thermal Expansion Tank 0.52 gal [2 Liter] 3/4 MNPT - Gray](//www.freshwatersystems.com/cdn/shop/files/fho6xjwexh6plotnxt16.jpg?v=1764842021&width=460)
Regular price From $27.78 Unit priceUnit price /UnavailablePart #: TET-02L
Save up to 8% with bulk pricing![Flexcon Thermal Expansion Tank 0.52 gal [2 Liter] 3/4 MNPT - Single](//www.freshwatersystems.com/cdn/shop/files/rv952atngt8v8t7uugcn.jpg?v=1764841578&width=460)
Flexcon Industries
Flexcon Thermal Expansion Tank 0.52 gal (2 Liter) 3/4 MNPT - Single
Regular price $29.17 Unit priceUnit price /UnavailablePart #: WAH2LB
Regular price $36.44 Unit priceUnit price /UnavailablePart #: TET-048
Sold OutAmtrol Compatible
Regular price $37.50 Unit priceUnit price /UnavailableSold outPart #: RO-122-W12
Sold OutRegular price $39.99 Unit priceUnit price /UnavailableSold outPart #: ST-5
![Neo-Pure Thermal Expansion Tank 0.52 gal [2 Liter] 3/4 MNPT - Black](http://www.freshwatersystems.com/cdn/shop/files/qlw22olwbejy26u7ouum.jpg?v=1764842467&width=460)
![Neo-Pure Thermal Expansion Tank 0.52 gal [2 Liter] 3/4 MNPT - Gray](http://www.freshwatersystems.com/cdn/shop/files/fho6xjwexh6plotnxt16.jpg?v=1764842021&width=460)
![Flexcon Thermal Expansion Tank 0.52 gal [2 Liter] 3/4 MNPT - Single](http://www.freshwatersystems.com/cdn/shop/files/rv952atngt8v8t7uugcn.jpg?v=1764841578&width=460)
Want to learn more?
Manage pressure safely with our expansion tanks. Thermal expansion tanks are designed to absorb excess water volume caused by thermal expansion in closed potable hot water systems, helping to also prevent pressure buildup and damage. Hydronic expansion tanks are used with boilers in hot water heaters and systems to relieve built-up pressure and maintain safe, efficient operation.
