Every twelve years, stored pressure dry chemical fire extinguishers must have a hydrostatic test. Per NFPA10, a hydrostatic test shall always include both internal and external visual examination of the cylinder. Hydrostatic testing shall be conducted using water or another compatible non-compressible fluid as the test medium.
All hydrostatically tested cylinders, except water-type extinguishers, shall be thoroughly dried after testing. If the cylinder passes the test, all parts requiring replacement are replaced, chemicals are installed, and the extinguisher is then certified. If your fire extinguishers are due for a twelve-year hydrostatic test, please contact us to schedule your appointment!