Accumulator tanks hold a reservoir of air and water down stream from the pump.The air acts as a cushion, absorbing pump and pressure fluctuations smoothing the flow and making the system quieter.
Accumulators allow the pump to reach shut-off pressure more smoothly which reduces the on/off cycle which gives better control of hot water delivery.
Our accumulator tanks all have a bladder that separates water from air.The bladder is prepressurised but may need fine tuning when installed to givethe most efficient performance. One of the advantages of an accumulator tank is that they can dispense up to half of their capacity of water even when the pump is switched off. So the bigger the reservoir, the more water you have available without having to switch the pump on helping you wash your hands or clean your teeth without noise.