Should you have any doubts about attempting this yourself, call the services of a professional.


Central heating systems today are fitted with a choice of two circulating pumps that feed the systems. Firstly there is the fix headed pump and secondly there is one is called a variable headed pump. The first pump (fix headed) will run at a constant speed, pumping the hot water around the system at a constant rate. The second is slightly different. The speed of Variable headed pumps is adjustable. On installing a variable headed pump the installer will balance the radiators, and adjust the pump speed in order to find the most effective temperature for each room. A South Kensington Plumber can fit both types of central heating pumps. Sometimes, a room’s temperature cannot be changed by opening a radiator’s valve, but it can be adjusted by varying the speed at which the circulating pump is runs. However, before adjusting this pump, you should make sure that all the radiators are showing the same temperature drop. Clip on thermometers can be bought to confirm this. Connect one of these thermometers to the feed pipe just below the radiator valve and the other one to the return pipe, also below the valve. There should be a temperature differential of approximately 11°C (or 20°F). If this is not the case then, close the lockshield valve on the radiator slightly to increase the difference in temperature or open the valve to lower it. Now, if the balance is correct, you can adjust the pump’s speed slowly with small turns until the best temperature of the radiators is found. Turn off the pump before making each adjustment. Any doubts don’t hesitate to contact a professional plumbers like South Kensington Plumbers who have the relevant skills to carry out all plumbing work and provide peace of mind guarantees for all jobs.