Therm-O-Flex Space Heating


Eliminates the risk of damage to the boiler and piping in the system. In-line tanks from 2 through 14.6-gallons free-standing models from 14.6 gallons through 96 gallons, plus special Combination Units. Not for use with potable water heating systems.

Therm-O-Flex Expansion Tanks


While most water heater installations in closed systems can be served by WaterGuard expansion tanks, the Therm-O-Flex expansion tanks are larger, and can handle higher storage volumes.

Waterguard Expansion Tanks


Many local codes now require a closed system which can cause damage if there isn’t a water expansion tank. Ours are durable and easy to install. A small price for insurance against damage. IAPMO approved.