Accumulators tend to discharge over time and provided the bladder or diaphragm remain in good condition we can recharge them to the required pressure. Should it not be possible we will look to quoting either to replace or repair the unit. For any of your accumulator servicing requirements please do hot hesitate to contact Hy-Power Products Ltd on 0800 018 7374 or send to us clearly stating who is sending it in with contact name and number, what is wrong with it for a no obligation quotation for repair / service or replacement.