A sprinkler system in which the piping up to the sprinkler heads is either filled with compressed air or air at atmospheric pressure; the water supply is controlled by an acceptable dry-pipe valve; also see dry-pipe sprinkler system.
A sprinkler system in which the piping up to the sprinkler heads is either filled with compressed air or air at atmospheric pressure; the water supply is controlled by an acceptable dry-pipe valve; also see dry-pipe sprinkler system.