Accumulator TankThe use of an accumulator tank is recommended to ensure effective and reliable system function. With an accumulator tank incorporated in the system, the intervals between cut-in and cut-out will be longer when only small amounts of water are drawn off. Less wear and tear on the pump with fewer starts and stops. Pre-pressurized at 0.8 bar / 12 psi.Volume: 2L/0.5galPort connections: 1/2" hoseHeight: 315mm/12.4"Diameter; 160mm/6.3"Weight: 1.2kg /2.7lbs