The Therm-X-Trol ST-1 absorbs thermal expansion and water hammer in tankless and point-of-use water heaters to protect the heat exchanger. Simple to install, the ST-1 features a patented air cell and requires no precharge adjustment or maintenance. With a 304SS waterway and a 7-Year limited warranty, the ST-1 has big protection in a compact size.
Eliminates the waste of energy and water, thus saving money
Protects the water heater and plumbing fixtures from premature failure
Prevents a dangerous pressure build-up in the system
Prevents the relief valve from going off
System connection: 1/2 in. NPTM
For use with tankless water heaters and point of use water heaters up to 2 Gal.
Therm-X-Trol brand is the #1 choice of professional installers
Professional plumber should check the complete system, including the Therm-X-Trol, yearly and more frequently as the system ages