We too are having problems with Aquability. We had a walk in shower installed for my elderly father but after a couple of years the pump began to cut out and water would not drain away. A telephone call to Aquability merely got us the advice that we should run the shower head into buckets and empty those elsewhere until the motor on the pump started again. As we had paid £299 to extend the warranty we asked that they should come and investigate. The 'engineer' told us the water flow was too high and turned down the pressure to the shower head. This did not solve the problem but somehow stopped hot water coming through at all. Further calls to Aquability and further visits from their 'experts' and we are told there must be a fault with our boiler not their equipment. We still have no hot water in the shower and it still doesn't drain properly. Aquability are now not returning our calls.