The 13 Gal. , 20 psi Precharge Horizontal Pressure Tank best to save energy. Max working temperature 210°F and Max working pressure 120 psi. The Replaceable Bladder. The pressure tanks of Varem line are a basic element of a potable water distribution system. The pressure tank stores the pressurized water of the booster systems working as hydrodynamic flywheel during drawing. This application reduces the frequency of switching on of the booster system. A pressure switch adjust the internal pressure and activates the pump only if the water pressure in the tank is lower than minimum required. Switching on, the pump loads the storage tank again.