In March I fitted a trident opel 10.5kw shower for a customer. When I tested it no hot water only cold. The customer took it back to Homebase and got a replacement. This worked fine until now. Just been round and no water at all is coming out of the shower. I disconnected the shower and the water pressure up to the unit is good. I suggested that he take this back for yet another replacement. Has anyone come across this shower? Could it be a faulty batch? Can anyone recommend a reliable alternative? or am I doing something wrong?