The Hydro Booster is a pressurized injector ideal for hydrostatic water line tests up to 250psi, as well as injecting chemicals into a pressurized system such as hydronic heating systems or geo thermal systems without introducing air. It can also push air into a gas line to perform a pressure test. It is operated using your cordless drill so no power is necessary. The Hydro Booster is an essential tool for plumbers, gas fitters, geo thermal technicians, and anyone working with pressurized systems. It makes maintenance jobs such as adding chemicals to boilers or geo thermal systems quick and easy. The Hydro Booster Dual Check Valve is recommended for gas line pressure tests and water line pressure tests for larger water line installs.