Section R. 408.10976 - Inspection and maintenanceRule 976.
(1) A halogenated extinguishing system shall be inspected by a trained and authorized employee or by an outside service not less than once a year to insure operability.(2) Not less than semiannually the following shall be accomplished: (a) The weight and pressure of a refillable container of a halogenated extinguishing agent shall be checked. A container shall be repaired or replaced if the loss in net weight is more than 5% or the loss in pressure is more than 10%.(b) The weight of a nonrefillable container shall be checked. A container shall be replaced if the net weight loss is more than 5%.(c) The weight, pressure, and date shall be entered on a tag attached to the extinguisher.Mich. Admin. Code R. 408.10976