There are two types of electrically operated valve that appear in central heating systems and they are as follows:The first is a two port valve that shuts on and off and the second is a three port valve called a Diverter Valve. This valve diverts the flow of water through the hot water cylinder when it is required to do …

Below is a list of useful tools for the plumber:Gas Blowtorch (soldering).A small hand held blowtorch direct heat source for soldering. Running on liquid gas is safe to use and efficient. Properly handled it can be used by professionals and beginners to plumbing. You simply play the torch over the joint until the solder flows. The gas is supplied in …