Stuart Turner Monsoon Negative 2.5 bar twin high-pressure pump driven by a continuously rated thermally protected induction motor. Designed to boost both the hot and cold water supplies it can be used to boost water pressure to a shower, bathroom, whole flats / houses and commercial premises. Is designed to be installed into systems where some or all of the outlets are above the cold water cistern (a negative position) but the requirements is for a fully automatic pump.