can any one help me , i have a salamander ESP100 cpv pump which is fitted in the loft it feeds 2 bathrooms which both have showers just recently the pump has started running when its not in use, for example when you have finished getting a shower the pump starts up for a few seconds then stops and this continues until you turn it offf from the mains i have contacted salamander and they advised me to check the expansion chamber i removed the dust cap pressed in the valve i was told if there was water in the chamber the diaphragm had gone there was no sign of water or air , i have got water flowing into the pump so there is no problem with that, the pump is roughly 3 years old and is out of warranty as you are probably aware these pumps are very expensive can any one give me some good advice
