A pressure tank is an essential part of a pressurized water system that provides water pressure. The tank stores water between the diaphragm and the liner. The pressure tank reduces the number of times the pump needs to start significantly increasing the lifespan of your well pump. The tension of the diaphragm maintains the water pressure within the system ensuring proper operation of all water appliances such as a dishwasher and washing machine and provides a robust flow of water for showering. No maintenance is needed. A properly set-up pump and tank will work as a team to deliver water pressure to your home and provide many years of dependable service. The Red Lion RL20A tank is a 20-gallon vertical tank with a drawdown of 7.2 gallons at 30/50 PSI. It is designed to handle up to 6 water fixtures simultaneously. The RL20A is equipped with a 1-inch FNPT threaded elbow system connection. The RL20A is made of heavy-duty 20-gauge cold rolled carbon steel with a 304 stainless steel connector. It has a triple grade almond paint finish. The liner material is FDA grade polypropylene. The unit is rated at a maximum working temperature of 194 degrees F and a maximum working pressure of 150 PSI. It can be installed in a series or in parallel for increased system capacity. Initial set-up: The tank is pre-charged to 20 PSI in order to transport this pump safely and must be filled with air to 2 PSI below the cut-in setting of the pressure switch. For example, a 30/50 system needs 28 PSI of air in the tank. A 40/60 system needs 38 PSI. To fill the pump with air, use a standard bicycle pump and monitor the pressure using a pressure gauge (not included). This system is NSF/ANSI/CAN 61/CAN 372 tested and certified by WQA.