Section R. 408.10923 - Inspection and maintenance of dry systemsRule 923. A dry pipe system shall:
(a) Have the system pressure checked not less than once a week and replenished, when necessary.(b) Have a means of maintaining the temperature of the dry pipe valve above freezing.(c) Have all low drain points drained and free of water during freezing temperatures.(d) Maintain the priming water at the designed level.(e) Give the dry pipe valve a working test, cleaning, and resetting not less than once a year.Mich. Admin. Code R. 408.10923