In 1954, Amtrol invented the first expansion tank to control pressure build-up and energy consumption in heating and chilled water systems. More than 50 years later the SX is still the one of the world?s leading floor-standing expansion tanks and is proudly made in the USA! The SX vertical boiler system expansion tank collects the expanded water as system temperatures rise which reduces potentially dangerous pressure build-up. Equipped with a 100 percent tested sealed air cushion, water-tight reservoir, air stem for pre-charge adjustment, and a deep drawn steel tank, the SX is reliable and built to last. The SX-40V is ideal for large residential and light commercial applications and can be used with high output boilers.
All SX thermal expansion tanks are made in the USA.
Heavy Duty Tank
From the deep drawn steel tank to the water-tight reservoir for expanded water, this thermal expansion tank is constructed for maximum strength and efficient energy consumption.
Eliminates Wasted Energy
Expanded water caused by thermal expansion is collected by the SX tank which returns the water back to your system which preventing faucet drips, intermittent toilet fill, and pressure relief valve discharge.
Protection for Your System
SX thermal expansion tanks are designed to protect your water heater, fixtures, and appliances by preventing dangerous pressure build up.