Central Heating Header Tank Overflowing

[transam]

we used to have this issue when we were coal fired, when very windy it would force the water to boil, lots of steam and water overflowing from the header tank, the only way to stop it was run the heating pump and open the hot taps to loose some of the heat

if your water level is rising you must have some water that is too hot somewhere, as the water doesn't expand till 100 deg?

may be unrelated and not right in your case but wasn't there a case a few months ago in the news where a hot tank boiled over dumped into a plastic tank that melted the killed a baby?

http://www.guardian.co.uk/uk/2008/jan/08/uknews4.mainsection[/QUOTE]

This was caused by a faulty immersion heater !! all imersion heater;s now must have a thermal cut out device ! solid fuel boiler's boiling ect header tank should be metal not plastic overflow should be metal not plastic !!

 

[markpearson]

OK thanks mate and everyone else who put there advice into solving this issue with me.

Cheers

Mark

 

[Tomsallagh]

Solved – The Header Tank (expansion tank) kept overflowing even after the ballcock and valve were replaced.

Background – this started to happen after the boiler and pump were replaced. When the (hot water) heating was turned on for a short while the header tank started to overflow. The heating engineer conducted an observation of the header tank whilst I turned on the hot water heating to see what happens. There was no water or drips coming from the vent pipe, yet after a short while the engineer could see the water level in the Header Tank rising towards the overflow pipe.

The cause turned out to be when the new pump was fitted the setting was set to 3 (there are three settings: 1,2,3). The engineer reset this to 1 as that was powerful enough for the pump to do its work efficiently based on pipe length, number of radiators, distance to Immersion tank etc. the setting of 3 was too powerful and thus pushed extra water into the header tank causing the overflow.

Follow-up - Having fixed the above problem, then thinking ahead, in order to prevent this ever happening again I decided to have the Header Tank replaced by a sealed ‘expansion vessel’ which makes the Header Tank redundant. Job done.

 

[bernardgreen]

If water was being pushed up into tank one has to ask where was it coming from ? Which radiator or other water filled item(s)was giving up the water that was going up into the header tank.

sealed ‘expansion vessel’ which makes the Header Tank redundant.

But brings a whole new package of potential problems. Safety devices that have to be checked every year by a qualified, registered and experience technician.

 

[flameport]

Solved –

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