Utah Admin. Code 710-1-9
Any extinguisher requiring a hydrostatic test as required, shall not be serviced until such extinguisher has been subjected to, and passed the required hydrostatic test.
At the time of installation, and at each annual inspection, all servicing shall be done in accordance with the manufacturer's instructions, adopted statutes, and these rules. Extinguishers shall be placed in an operable condition, free from defects which may cause malfunctions. Nozzles and hoses shall be free of obstructions or substances which may cause an obstruction.
Seals or tamper indicators shall be constructed of approved plastic or non-ferrous wire which can be easily broken, and so arranged that removal cannot be accomplished without breakage. Such seals or tamper indicators shall be used to retain the locking pin in a locked position. Seals or tamper indicators shall be removed annually to ensure that the pull pin is free.
A new extinguisher that has the date of manufacture printed on the label by the manufacturer, or date of manufacture stamped on the extinguisher by the manufacturer, does not require a service tag attached to the extinguisher until one year after the date of manufacture.
Utah Admin. Code R710-1-9