i recently installed a salamander pump to power my new power shower and rectify my low hot water pressure. after a short time, the pump started becoming very noisy and cutting out and eventually stopped completely. after closer investigation, the hot water pipe coming out of the pump, into the shower was blocked behind the gause on the shower to prevent any solid items travelling inside your shower. it was like plastic shavings and after even closer investigation, it was the disc inside my salamander pump at the hot water side had been causing friction when spinning around and actually shaving the disc on the inside of the pump. i thought perhaps my hot water was too hot, and tried lowering it to 45 degrees, but the pump didnt work at all because vertually no water was going through the pump due to my very low water pressure. i ended up telling salamander the pump was faulty (because i thought it was) and i was sent a new one. now the new one has started doing the same. so it must be a problem with the way it is plumbed in?? can anyone tell me what is wrong please and how to fix it??