1. Suitable for four types of fire protection systems: sprinkler system, foam system, water suction system and fire fighting system 2. The main pump will be started when there is an occurrence of water leakage encountered at any part of pipelines in the fire control system that leads to a pressure drop inside the pipeline to the present starting point of pressure switch. In order to avoid a start of main pump due to a minor water leakage, the mounting of auxiliary pump is purposed to take care of the water leakage in this regard, that is, auxiliary pump will be started/stopped when there is an occurrence of water leakage taken place to the pipeline while the main pump will not be started.