There are times that you experience a low water pressure or low water flow, especially when taking a shower, or if you've decided to install a shower jet system. As an Official Installer of Salamander Pumps, London Heating Expert would design, install and maintain Salamander pumps as well as other brands based on your particular needs. Booster pumps could be used to boost the pressure on a single shower outlet or boost a whole house. London Heating Expert epending on what type of cold/hot water system you use