Draining gas heating systems before additional work







Draining gas heating systems before additional work

At some time in the life-time of your fully pumped gas heating system you will wish to flush it. To work on a heating radiator problem or to extend the system perhaps. This is often performed by the plumber during repair or extension work although some experienced homeowners have been known to clean their own gas central heating systems.

The primary cause for most people for Flushing their central heating system is to clean the heating radiators. Switching off the heating boiler and heating pump should be the first steps you take. Another essential step is to ensure that no additional water enters the gas heating system whilst you are Flushing it.

Your central heating system is topped up with water through the expansion water tank. The expansion cylinder uses a ballvalve similar to that in a toilet system. The ball floats on the water surface lifting 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. Water will need to be prevented from entering the gas central heating system if the Emptying process is to complete. Using a metal or wooden rod to stop the ball leaves are falling in the cylinder will stop water getting in the system as the water is flushed.

When all these precautions have been implemented, you should connect a hose to the part of your heating radiator known as the outlet and run the end of the hosepipe outdoors. Water will now passage out of the heating radiator through the hose into the external clear. The hosepipe should be connected to one of the lower heating radiators if you intend to clear the whole central heating system. Before you begin any other work on this central heating system you must now ensure that all the water has emptied out and no other the water is entering into the radiators.

To make your gas heating system drain quicker you should open any bleed valves on your radiators, starting with the metal radiators on the top story and working your way down. Work can start when all the water has emptied out.

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