Amtrol Therm-X-Span T-5 Thermal Expansion Tank (2 Gallon Volume)
The Therm-X-Span T-5 is designed for use in closed, potable hot water systems, Therm-X-Span accepts expanded water as system temperature rises. This hot water is returned to the system when demand occurs. A thermal expansion tank, like Therm-X-Span, is essential in a closed system to protect your water heater.
