Glowworm 24cxi pipe outside house dripping water

[walls29]

I have a Glowworm 24cxi combi condensing boiler, it's about 10 years old, has had its ups and downs but still going.

The last time I had it serviced, I mentioned to the chap that the pressure had gone down, and when I filled it using the filling loop, it had gone down quite quickly again from say 1.5 to 0.7. He said this was nothing to worry about and I should only worry if started flashing red.

I didn't therefore worry too much, but a few months ago I started noticing water appearing at the bottom of my outside wall. At first I thought this was a leak from a neighbour as he said his toilet was leaking, but it turned out to be nowhere near this.

I then noticed that the metal pipe which sticks out of the wall, way down from the funnel which steam comes out of, was dripping water, and sometimes quite a lot of water is coming out and dripping onto the paving outside, so I am trying to figure out if the water I have been seeing is from this and if this is normal, or whether it is either related to the pressure drops, or there is a leak somewhere else which might also be related.

I have someone coming out to it this week, but just want to gather information as I'm wondering if the chap who serviced it last should have been a bit more interested in the pressure drops I mentioned rather than just signing it off as fully functioning?

 

[ScottishGasMan]

If it only really starts dripping when the central heating is on then its very possible just the expansion vessel needing a look at. What does the pressure read when the heatings hot?

theres a possibility that the valve which allows this overflow to run may need changing also if its been dripping for a while.

 

[walls29]

If it only really starts dripping when the central heating is on then its very possible just the expansion vessel needing a look at. What does the pressure read when the heatings hot?

theres a possibility that the valve which allows this overflow to run may need changing also if its been dripping for a while.

Thanks. Have been running the heating, turned on the hot tap to get the pressure to display and it was 0.9 It was 1.0 when I got in today and 1.5 when I filled it yesterday afternoon, so not sure if all the pressure is being lost out of the dripping or something else going on!

 

[OwainDIYer]

I then noticed that the metal pipe which sticks out of the wall, way down from the funnel which steam comes out of, was dripping water,

that might be from a drain point rather than the pressure relief valve?

 

[walls29]

Frustratingly, I can't seem to find a picture of what a pressure relief pipe is like anywhere on Google, to compare to the pipe I have. It is a metal pipe which comes out of the wall and bends downwards, is the only way I can describe it?

I will try to take a picture but am away from house at the moment.

Got someone coming on Wednesday.

 

[mogget]

It is a metal pipe which comes out of the wall and bends downwards

That will be the pressure relief pipe, providing all is installed correctly.

 

[walls29]

Thanks for the answers here, I had someone out today to fix it, he replaced the pressure relief valve, pressure reading all as it should be now.

I still have the issue with the water, have posted elsewhere in more detail about this, but what he said was if I had an internal leak, it would be unlikely to find its way through the walls to the outside as in the picture linked to below:

http://postimg.org/image/dvjm8ahfb/

Any thoughts would be appreciated, my neighbour has said it's nothing to do with him, but the plumber today said from what he can see it's 99% certain the source is the neighbour's house and not mine.

I just want to arm myself with as much info as possible before I confront my neighbour for the 4th or 5th time about this (last time he said his toilet was nowhere near the leak, but there is a plastic overflow pipe sticking out of his wall not that far away, which can only fall onto his flat extension roof if it does overflow, and may also be a problem with his roof...

 

[walls29]

BTW, I asked the bloke who fixed my boiler (from British Gas) whether the pressure relief valve leaking would have led to inhibitor leaking out of the system/becoming diluted.

He said no.

Was this the correct advice do you think?

Apologies for any questions that sound stupid, I am not very handy and need to learn basic things, thanks.

 

[walls29]

Am I asking this in the right place?