A “hydro test” is an approved way to test the structural integrity of a compressed gas container and is required by the Department of Transportation as well as other international regulatory agencies. 

It is performed by removing the valve, filling the container with water, and then pressuring the container above its operating limit.  The expansion of the cylinder is measured, recorded, and analyzed.  If the cylinder expands beyond certain limits, the cylinder must be condemned.

Escos Fire & Safety is the premier bay area DOT Hydrotest facility.  Our meticulous process involves de-valving cylinders for a thorough visual inspection of both interior and exterior walls.

Our skilled personnel at Escos Fire then perform a hydrostatic test, ensuring the cylinder qualifies to uphold the manufacturer's pressurization requirements and maintain its structural integrity.

Upon completion of testing, we stamp our Re-qualifier's Identification Number (RIN) into the cylinder. This mandatory qualification typically remains valid for five years from the test date, in adherence to DOT cylinder classification standards.