The automatic booster systems consist of a water pump, a membrane tank, apessure gauge and a pressure switch. Most of water pumps in this catalogue can be composed and become an automatic booster system. The pressure tank with a non-toxic rubber membrane, also called pressure vessel, has been pre-filled with air pressure of about 0.12 Mpa before leaving the factory. This system gives suitable mains water pressure as required by modern domestic appliances , and will ensure enough water to supply all usere outlets. These pumps should be installed in a covered place and protected against the weather impacts.