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Plumbing

High boiler pressure and a leaking overflow

Anonymous user 23/02/2024 - 2.59 PM

How do we get the pressure down to where it's meant to be and the drip to stop? Its a Potterton Gold Combi boiler. Installed abut 5 years ago. We had a faulty bathroom tap replaced and that's when the problem started, although the plumbers we used claim it can't be anything to do with their work, and that they would charge us for another call out. Too much of a coincidence i feel. Pressure is stuck around 3 bar. Pipe drips every 10 seconds. Tried bleeding radiators but to no avail.

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3 Answers

Anonymous user

Hi best thing to do is find central heating drain point outside and let some water out this will decrease pressure Or if you cant find that let about a litre of water out air point on radiator Also check that valve to fill heating is closed off properly
Answered15 September 2015
9

Anonymous user

The high pressure can only be cause by the filling loop being connected and letting by and reaching the pressure of the mains water.secondly the expansion vessell has lost its charge and as water gets heated the water needs to expand and this raises the pressure,thirdly the domestic heat exchanger has failed and the mains water pressure then increases the boiler to the pressure of the mains water.Lastly the pressure gauge could be stuck at a high pressure
Answered15 September 2015
8

The Ugly Duckling Building Company Ltd

Rating: 5 out of 5
Bath
If the pressure doesnt drop when bleeding radiators then you probably have a broken valve on the filling loop. However, you should never mess around with a boiler unless you are qualified to do so..Very dangerous pieces of equipment in the wrong hands. I wouldnt have thought they would have touched the boiler when replacing a bathroom tap, you should have isolation valves. Give a local plumber a call, make sure you give him a cup of tea and a biscuit when he arrives! Good luck.
Answered15 September 2015
2