If there is a need to replace a defective shower pump, then you will firstly want to make sure that you have been supplied with the correct unit to fit. Do this by either removing and taking to the supplier or by taking a photo of the pump and using it as a guide. These are usually fairly easy to fit and are fed via a 13 amp fused plug into a socket adjacent. If you are not confident to carry out this work on your own, you should call a professional plumbing service such as Leytonstone Plumbers who are qualified to carry out such work. Here is a brief guide:a). Turn off the hot and cold water and confirm.b). Open any drain off cocks (if any) and drain any water from the pipework to the pump. Or standby for some water to appear as you disconnect its pipework. Thankfully the connections are normally made by a flexi connection with push fit compression joints. The new unit should be the same, in which case it is often just a case of removing the old and fixing on the new connections, as the flexible connections will allow lots of free movement to do the replacement.3). Switch the water supply back on and inspect for leakage.4). Plug new pump in the original electrical socket.You may have to adjust and alter the pipework if there are no flexi type connections available, at all times ensuring the integrity of the water connections of the new pump, from cross threading or direct heat if soldering is required. The above is a guide, so if you don’t feel confident to carry out the work yourself, call a plumber such as a Leytonstone Plumber who is experienced in this work.“