Amtrol Therm-X-Trol ST-1 Thermal Expansion Tank

Amtrol 398917 Details

Prevent dangerous thermal expansion with this Amtrol Therm-X-Trol ST-1 thermal expansion tank. This tank is designed for use with closed, potable water systems, specifically tankless and point-of-use water heaters. It accepts expanded water as the system temperature increases, which keeps pressure below the valve setting. This handy tank saves energy, eliminates potential safety hazards, and reduces system maintenance.

This tank has a durable outer shell made of corrosion-resistant, glass-filled composite. It has an air cell membrane that never requires charging, and that offers superior pressure surge capacity. Plus, the entire air cell surface absorbs energy for ultimate protection. For additional durability, this unit includes a stainless steel waterway to withstand tough water conditions.

This tank has a maximum operating temperature of 140 degrees Fahrenheit and a maximum working pressure of 150 PSIG. This unit requires no pre-charge adjustment or maintenance, and it has a 1/2" NPTM water connection. This model meets manufacturer and plumbing code requirements.

Overall Dimensions:
Diameter: 3 7/16"
Height: 4"