What is this hose in my roof?

[a]

There's a small wet stain on one of our upstairs ceilings, so I climbed into the loft to take a look.

This is directly above it:


Where the black section meets the grey section, there's a bit of water.

Any ideas what this is and why it's dripping?

In case it helps, the house is only a couple of years old (past the snagging period unfortunately)

[silobass]

Extractor from the bathroom?

[jmorgan]

Mine is a vent fair the soil pipe to a vent tile in the roof. That a soil pipe it is comping from?

[a]

silobass said:

Extractor from the bathroom?

We have four bathrooms with four extractors, and this is the only hose I can see in the loft.

Although I suppose they have to go somewhere, so maybe they all run under the insulation and join up here?

Why would it be leaking? Can I just wrap something around the joint or does it mean the roof vent needs replaced?

[a]

jmorgan said:

Mine is a vent fair the soil pipe to a vent tile in the roof. That a soil pipe it is comping from?

Hmmm yes could be, actually. Our soil pipe is internal and I believe it's in the approximate location where the grey hose appears...

But again... Why the leak and what's the fix?

[jmorgan]

Can't help for the leak. Tile not places correctly or whatever it site on? Not my area. I know about the pipe as it came adrift and needed re attaching.

[a]

OK thank you, will investigate further

[MX5_Nuts]

My guess it's a soil pipe and when it rains water is getting in the pipe and leaking from a join somewhere.

[jas xjr]

is it possible that the leak is coming from the roof . where the pipe exits the roof ?could be a slipped tile of maybe a danaged flashing. i am hoping that it is visible from the ground .
somebody that knows what they are talking about will be along shortly...

[Simpo Two]

a said:

Where the black section meets the grey section, there's a bit of water.

Any ideas what this is and why it's dripping?

You could be pragmatic and just tighten it up until it stops dripping. Doesn't really matter what it is, the main thing is you don't want it to drip!

[roofer]

It connected to a roof terminal vent, you should be able to spot it from outside.

It's either venting the soil stack (are all toilets against that wall?)or the extracts in bathroom(s)

If extracts, i would suspect, looking at the way they have elbowed it across, that condensation is forming, and leaking out of a joint. If not, go and check it when raining.

[sherman]

Cover the joint in some plumbers mait and forget about it.
http://www.screwfix.com/p/evo-stik-plumber-s-mait-...