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Heating systems can be emptied







Heating systems can be emptied

Taking the water out of a fully pumped gas heating system makes many upkeep tasks easier. To totally flush the system of slime and contaminants might be one such example. Whilst this will be executed typically by an experienced plumber it is something that the average handyman can execute if they have the experience of other household maintenance tasks.

Whilst there can be a number of reasons the most common is to flush the metal radiators. Before any work is undertaken you need to switch off the heating pump and central heating boiler. Another crucial step is to ensure that no additional water enters the heating system whilst you are Emptying it.

The heating system has a header cystern in the attic which will ensure that any water shortfall is topped up. The passage of water in the expansion tank is determined by use of a common ballvalve. The ball floats on the water surface raising a metal lever closing the valve when the water has reached the correct level. The valve will be opened in the water levels fall as the ball will float on the falling water surface. To ensure that the heating system fully empties we need to stop this mechanism. One of the best ways to contain this is by putting a piece of wood across the cylinder and tying the value arm to it, which will close this valve.

Having prevented the entry of any water to your heating system you can now take the next step by attaching a hose to an outlet valve on a radiator and running this to the outdoors of your property. The central heating system can now empty by water flowing out of the heating radiator, through the outlet valve, and into the outside flush. The hose pipe needs to be connected to the lowest point in your heating system which will be one of the ground floor heating radiators. Be patient and ensure that all water has emptied from the central heating system and no more water is getting in before you start any further work.

More air can enter the gas central heating system if you open the top level radiator bleed valves and this will help things to conclude quickly. When the water is emptied off you are free to work on your radiator.

Posted in Boiler


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