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Boiler Overflow pipe outside - still dripping slightly

4 replies

Thewishingchair123 · 15/03/2025 19:40

Hi - calling on any wise Mumsnetters. I have had issues with my Worcester boiler in the last week . I noticed that the overflow pipe outside was dripping and looking at the ground had been some time. (Although it was serviced mid January) I then checked the bar pressure and it was very high (3.6 bars). Immediately turned off the boiler and a British Gas engineer came round the following morning. He thought it was an issue with the keyless filling valve (underneath the boiler) and replaced it. Said if boiler pressure rose over 2.5 or if it was still leaking to call them.
Since then been keeping an eye on boiler pressure and it seems okay and within the parameters of what the engineer said was acceptable (currently 1.5 , rises to 2 when running hot water/when central heating on). So not over what he said. But the overflow pipe outside is still dripping a little bit (would estimate about 15mls since this morning about 9am , so that amount in 9 hours ) - not had heating on, but have run hot water.
i have an appointment with a British Gas engineer on Thursday 20th. Am I okay to keep the boiler on ? Do I need to turn the water off? Googling it, it doesn’t seem to suggest this . The engineer I had round last Sunday 9th didn’t say to do either, just call them. But wanted to be sure. Think I’m panicking :( Thank you in advance.

OP posts:
Growsomeballswoman · 16/03/2025 07:02

What kind of boiler is it? Do you have a hot water tank? Is the water warm

Thewishingchair123 · 16/03/2025 09:30

It’s a Worcester Greenstar 8000 Combi boiler. I don’t have a hot water tank. The water is hot when I turn on the hot water taps (takes eg 30 seconds as on eco mode). Thanks x

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housethatbuiltme · 16/03/2025 09:45

Your condensate pipe is designed to drip, thats the point of them. It then comes down to if it drips excessively. If the boiler is in constant use it will drip a lot but that would be completely normal function.

If you switch it off and its still constantly dripping when the boiler has not been used for a day or so you might have a broken Heat Exchanger. If it is your best getting a new boiler.

Thewishingchair123 · 16/03/2025 10:14

@housethatbuiltme Thank you. It’s the boiler overflow pipe (coppper pipe) that is dripping not the condensate pipe.

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