preaction sprinkler system

preaction sprinkler system

A dry-pipe sprinkler system which is activated by a smoke- or heat-sensing device, thereby opening a control valve and admitting water.

preaction sprinkler system

preaching cross at Inverary, Argyllshire, Scotland
A fire sprinkler system using automatic sprinklers (heads) attached to a piping system; is controlled by a supplemental fire detection system, that is installed in the same area as the sprinklers; actuation of the detection system opens a valve which permits
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
With a preaction sprinkler system, water (held back by a preaction valve) is prevented from actually filling the pipes until an event occurs, such as the activation of a heat or smoke detector.