Commercial al Purpose Pressure Vessel/ Tank is a device mounted on a hot water heater or boiler. The Pressure Vessel/ Tank is specifically designed to release high steam pressure in the tank and thus prevent tank explosions. The Pressure Vessel/ Tank is equipped with specialty valves and is used in a variety of pneumatic, hydraulic and cryogenic applications to provide protection from over-pressure in steam, gas, air and liquid lines. Commercial Purpose Pressure Vessel/ Tank facilitates letting off the steam when safe pressure level is exceeded.