Assertion: sprinkler's operation | /r/Causes | a pressure drop
Facets:
Source sentences:
text: A jockey pump is a small pump connected to a fire sprinkler system and is intended to maintain pressure in a fire protection piping system to an artificially high level so that the operation of a single fire sprinkler will cause a pressure drop which will be sensed by the fire pump automatic controller, causing the fire pump to start.