Control Valves

The valves that control you central heating system are sometimes called zone control valves and always indicate a direction of flow by markings on their body as direction of flow is really important in a system that carries a large volume of water. There are two types of electrically operated valves fitted in nearly all central heating systems. 1). The first of these types is known as a two-port valve which turns on and off.2). The second type is known as a three port valve called a diverter valve that will redirect the water flowing through the cylinder for the hot water as and when it is required to do so. Chessington Plumbers are able to supply and fit both of these types of valves. Valves are a relatively simple yet long lasting part of a heating system, capable of years of constant work by your central heating. Although having said that, like many things that work hard, valves can start to fail with the electrical parts developing faults, and failed seals leaking. These failures are very important in a home, because everyone relies on their heating system. These parts are not normally very expensive to purchase but just check and test the old one first just to make sure that the problem is not in the wiring or control timer, it may save some money.During an emergency it is sometimes possible to disconnect the wiring for the valve allowing the operation of the system to continue, however make the cable safe by disconnecting it at the controller and then opening the valve with a screwdriver or a small spanner. This procedure will result in there being no zone control but it is a good option in certain situations. A Chessington Plumber is a skilled professional.