The ideal complement to the Aqua 8, Aqua F and pumps of other brands. The A20 prevents unnecessary switching on and off the pump cycle and ensures a smooth flow of water. Reduces water consumption and extends the life of the pump and boiler. The internal diaphragm absorbs the water surges and ensures a continuous flow of water. The A20 can be disassembled for possible interventions on the membrane. Preset pressure of 13 psi (0.9 bar), but can be charged with a conventional compressor to adapt to standard pressure switch pumps. Connection for 10-12 mm hose.