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Combi Boiler - Hot water pressure low

Hi All,

I have a Halstead boiler and at the weekend i went round and bled the radiators, the pressure dropped and i remembered i had to top up the water, so opened up the valve but unfortunately i opened the wrong pipe, i managed to top the water in the heating system back to 1.5bar but now i have ahardly any hot water pressure, i tried adjusting the wrongly opened pipe but it doesn't seem to make a difference, when i turn a hot tap on full it sounds as if the boiler is filling up again.

sorry if this doesn't make sense. any ideas how/why i have a loss of hot water presure (cold water is fine)

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  • paula917 Dec 31, 2008

    I have a Valiant Combi boiler and noticed the pressure was way below it should be. I live in a tall flat - and the rads upstairs were not getting hot (this is what made me look at the manual). Had engineer come out y'day and he said the pressure had dropped and showed me how to increase it by opening to taps. Last night pressure dropped again so done as I was shown - this morning rads didn't come on at all and after I pushed the ignition button the boiler started - but the pressure is still very very low. Can't get hold of engineer (typical) - any suggestions as to why this is happening please ;-)

  • stevedixons May 11, 2010

    how long does it take to fill a pint of hot water?

    this will allow me to gauge your flow rate.

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I have a 1 bed flat, above an old pub. I have a combi boiler but my water pressure is ridiculous. The shower water runns down the shower head. I'v been told that the cold water feed to the building is split to two boilers, one to the pub and one to me. Im thinking of installing a shower pump in between the boiler and the shower. will this work as my friend says he has done this and it sorted his problem out. I'v looked it up on the net and everything says this does not work. Help please.....

Posted on Dec 24, 2009

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The coil inside got clogged

Posted on Jan 03, 2009

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