Low pressure in a boiler can be simple to find as most boilers have a built in pressure gauge. Whatever the pressure in our mains network the plumbing for the water pipes in your home could substantially lower that pressure by the time it gets to your taps. Losing pressure may be due to a water leak or expansion vessel failure causing damage to the pressure relief valve. Charlton Plumbers are fully qualified to diagnose and rectify. Constant water pressure is important to maintain the efficient functioning of your boiler system. The pressure in newer combination boilers is maintained by the flow of cold water from the mains supply through a mechanism known as the filling loop. You may be able to manually regulate the amount of water circulating your radiator by using a filling loop, meaning you can re-pressurise your boiler. Check your boilers instructions to see whether you can re-pressurise your boiler yourself.If you can, you should follow these instructions: Identify the filling loop and pressure gauge. Practice switching the boiler controls to off before attempting to top up the pressure. Ensure that the pressure gauge can be seen, (the ideal temperature for any sealed system is 1.5bar). The filler loop should have a silver flexible tube with two handles; in the off position the handles will be across the flow of the pipe. You need to slowly turn them so they straighten in line with the pipework. You will now be able to hear the water flowing through into the boiler. Carefully check the pressure gauge as it creeps into the green area or the 1.5 bar marker. Now turn the handles back to the original position. A common mistake is to over pressurise, this happens when you cant see the gauge as you increase the pressure. Therefore if you cant monitor the gauge yourself, get someone else to come and help you. If you continue to have pressure problems after you re-pressurise your boiler, a Charlton Plumber will be happy to carry out this task for you.
Combi Boiler loses Pressure