Thermal Expansion Tanks

As water or anti-freeze solutions heat, the pressure resulting from the expansion of the fluids may cause the relief valve to discharge or create other unsafe conditions.

• Effective control of thermal expansion
• Polypropylene liner maximizes corrosion resistance
• NSF 61 approved

Water heater manufacturers and plumbing codes require the installation of an expansion control device if a backflow preventor, pressure reducing valve or check valve is installed in the domestic supply line.