Gas heating systems can be drained
Gas heating systems can be drained
Cleaning a fully pumped gas heating system makes it easier to work on the system. To work on a radiator problem or to extend the system maybe. Flushing your system is something that can be done by the none professional but competent do it yourself practician.
Whilst there can be a number of causes the most common is to flush the heating radiators. Before any work is attempted you need to switch off the water heating pump and gas fired boiler. Prevention of any additional water entering the central heating system is also a priority.
gas central heating systems are normally filled up through a header tank in the attic. This has a ball valve that is the same as the one seen in your toilet water tank. As the water reaches maximal level the ball floats on the surface and shuts the valve. However when some water is pulled off the tank, the ball drops, the valve opens and more water gets into the cystern. This process will need to be stopped if the heating system is to be fully drained. A good way to do this is to stop the ball moving by connecting it to the top of the water tank.
Once you have completed the above run a hose from an outdoors clean to the outlet of at the bottom of one of your heating radiators. The gas heating system can now empty by water flowing out of the heating radiator, through the outlet valve, and into the external drain. Obviously, if you want to flush the whole central heating system you will need to connect the hose to one of the level metal radiators. Be patient and ensure that all water has emptied from the heating system and no more water is getting in before you commence any further work.
To make your gas central heating system clean faster you should open any bleed valves on your radiators, starting with the heating radiators on the top floor and working your way down. Work can begin when all the water has emptied away.