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Hydrostatic Testing Services

Texas Dive Center, Inc. offers hydrosatic testing services of most types of D.O.T. rated cyclinders not exceeding 34" in length and 26" in diameter, both steel, aluminum and fibre from 2000-10,000 PSI test range. We test SCBA, paint-ball and other cyclinders as well. Our D.O.T. certified cylinder re-testers do all of the work in-house. Don't be fooled by others scuba dive shops in the region that say they hydro - ask to see their equipment and re-tested certificates from the D.O.T.

How We Do It

It all starts with conducting a proper visual inspection of the tank. Visual inspections at the time of hydrostatic testing must be performed by a D.O.T. licensed test agency, like Texas Dive Center Inc. of LUbbock, TX in accordance with CGA Pamphlet C-6.1, Standards for Visual Inspection of High Pressure Aluminum Compressed Gas Cylinders. The internal and external visual inspection of a cylinder is performed prior to hydrstatic testing of the cylinder. Inbetween hydro re-certifications, the annual visual inspection can be performed by any properly trained technician following the D.O.T. standards for such inspections, such as at our PSI Premier Facitly. The inspection consists of checking for cracks and fissures, sidewall stamps, rust, and verifying the correct tolerances for outside diameter, wall thickness, length and straightness. If the tank meets the standards of C-6.1 we affix a sticker. We will not fill cyclinders that don't pass our visual inspection of the cyclinder.

Certain aluminum cyclinders (6351 alloy) will require a Eddy Test. This is a special electronic inspection of the cyclinder neck threads that a visual inspection would not necessarily see. Some cylinders may need to be cleaned on the inside, and/or have their valves serviced or replaced. Next the cylinders are put under pressures higher than their normal working pressures. Hydrosatic testing must be performed by a D.O.T. licensed re-test agency like Texas Dive Center, Inc. Once a cycllinder has successfully passed all visual inspection and hydro testing requirements, it is peremanently marked with the test date and our D.O.T. licensed test ageny's number.


As they say, "you get what you pay for." So the cost of our service is dependent on what is needed to re-certify your cylinder(s). Foremost however, it is based upon what needs to be done to make the cylinder safe for you to use. Ask about volume or governmental discount pricing. In addition to these costs, other labor charges ($60 per hour) for basic services may be required and parts/service kits are additional. The cylinder valve may need rebuilding or replacing or other special  needs met as well and are not reflected below:

Normal Hydro Testing Fees:

Cylinder Hydro (incl inspection and air fill)   *           **                                           $58

SCUBA Cylinder Nitrox Hydro (CO2 Cleaned, Inspection and Fill)                      $75

*  SCBA Composite Cyclinders without valve removed add $20. With the valves removed add $10

** Eddy Current 6351 cylinders add $20

Cylinder tumbing $30.

Annual Visual Inspection $20

Twin Cyclinder disassembly fee $30.