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How to reduce pressure in central heating system

(7 Posts)
Madelinehatter Sun 27-Dec-15 20:14:10

The pressure dropped and boiler went out. This happens occasionally and I usually turn the valve to refill. For some reason I didn't manage to turn it off quickly enough and the needle went really high. Usually I would just bleed a rad until the pressure dropped. Unfortunately have tried this and system keeps refilling. Suspect the valve I use to refill is not turning off properly but it seems tight enough.

Any ideas anyone? Have had heating on but of course it is spurting water out of the pressure release. Not sure how safe it is to have on but have no other heating.

luchadragon Sun 27-Dec-15 20:21:40

There should be two taps or valves? On mine I open them until the pressure goes up to twenty then close them again.

I feel your pain, having had no heating or hot water since the day before Christmas Eve due to a broken fan (that engineer can't get till Tuesday)fhmm

Hope you get it sorted

ABetaDad1 Sun 27-Dec-15 20:26:41

There are two valves on mine. Two taps in line on the same pipe.

Have you tried turning it off with a spanner/wrench/pliers.

Incidentally your system should not be depressurising so frequently. It must have a leak in it somewhere. Possibly a leaking radiator valve.

Madelinehatter Sun 27-Dec-15 22:32:17

Thanks for replies. I can't see another likely valve. Anyway the system just keeps filling as think the filler valve is loose but can't tighten it any more than it is. I have boiler cover and he's coming tomorrow thank god.

We lit a fire in our open fireplace to help heat is up.....mistake. My he house is full of smoke now! I think the chimney needs a sweep!

Bloody hell!

gingeroots Mon 28-Dec-15 09:38:56

Just bumping for you .
I once overfilled a pressurised system with fairly disasterous results involving lots of cascading water .

Where's piglet john ? Anyone would think this is a bank holiday smile

PigletJohn Mon 28-Dec-15 13:30:01

if the pressure keeps going up, then the filling loop is not closed. It should have a valve at each end, and you should close both of them.

Excess pressure will cause the pressure relief valve to open and water will squirt out. Usually through the pipe that goes through the external wall behind the boiler and curves round to squirt against the wall.

Madelinehatter Mon 28-Dec-15 14:46:05

Thanks all. Now sorted.

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