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 Post subject: Condensation on pipes?
PostPosted: Wed Oct 18, 2017 4:00 pm 
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Hello

I have been in a new build house now for about 18 months.
Since we have been in there we have experienced excess water around the main water pipes (which reside under the sink) that are connected to the mains supply.

The problem being that these pipes seem to drip, we have been told that this is just condensation by the builder and all plumbing is ok
I just wanted a second opinion really, as I now notice that the pipes are gradually turning black now and they mark clothing/skin whenever reaching under the sink.

Every few weeks I am wiping out the cupboard...

Is this normal!?


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PostPosted: Wed Oct 18, 2017 4:04 pm 
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It's condensation.* Don't dry clothes in the house. Try to ventilate.
I'd also insulate the pipes if possible.
http://bit.ly/2yxdCes

*ETA Assuming it's been checked for leaks, which you say it has. It's looks like condensation.


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PostPosted: Wed Oct 18, 2017 4:58 pm 
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Condensation is common on cold water pipes pop some pipe insulation around them that should do the trick! :thumbright:

http://www.diy.com/departments/climafle ... 868_BQ.prd

http://www.diy.com/departments/climafle ... 869_BQ.prd

Most pipes look to be 22mm the smaller one is 15mm.


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PostPosted: Wed Oct 18, 2017 5:01 pm 
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Is that bit of string wet? It is a way of wicking a small leak into one place. Just wondered.

The incoming water is cold and any moisture in the air will condensate on the pipes. So why is there so much moisture laden air in the cupboard? Leave the doors open to allow the warmer air to circulate and see if that affects anything.

DWD

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PostPosted: Wed Oct 18, 2017 5:05 pm 
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toolbox wrote:
Most pipes look to be 22mm the smaller one is 15mm.


Agreed.


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PostPosted: Wed Oct 18, 2017 5:12 pm 
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Thanks, i will get some lagging.


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PostPosted: Wed Oct 18, 2017 5:13 pm 
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I've never seen a condensation issue that bad on an incoming main. I wonder if there is an issue with a leak after the pipework leaves the cupboard which would cause that pipe to be permanently cold ?

Put the sharp end of a screwdriver on the cold pipe and your ear to the blunt end, with all taps and other outlets shut can you hear water running or a "bubbling" sound ?

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PostPosted: Wed Oct 18, 2017 5:16 pm 
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Turn off all taps and water outlets and go and check your water meter.

The little 'star' in the middle will turn even with the slightest of leaks/drips.

If there is no movement after a couple of minutes, you have no leak.

I have also never seen condensation affect pipes in this area.

Also check your sink wastes for any possible leaks.

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PostPosted: Wed Oct 18, 2017 5:20 pm 
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My sink cupboard had bad condensation till I lagged the pipes.
Usually on an outside wall with cold water running through and unheated space below it, bound to get condensation.


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PostPosted: Wed Oct 18, 2017 5:22 pm 
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Not saying either w~o or gas4you are wrong, but I think it depends where you are. We get it under the sink here, definitely no leaks etc. It's the damp climate down here near the sea. The cistern in the one loo is a PIA for it as well.


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PostPosted: Wed Oct 18, 2017 6:07 pm 
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Dave54 wrote:
Not saying either w~o or gas4you are wrong, but I think it depends where you are. We get it under the sink here, definitely no leaks etc. It's the damp climate down here near the sea. The cistern in the one loo is a PIA for it as well.

Same here downstairs WC aǹd we are near the sea too, do you think it might be tidal? :huray:



For this message the author toolbox has received gratitude : Dave54
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PostPosted: Wed Oct 18, 2017 6:26 pm 
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toolbox wrote:
Dave54 wrote:
Not saying either w~o or gas4you are wrong, but I think it depends where you are. We get it under the sink here, definitely no leaks etc. It's the damp climate down here near the sea. The cistern in the one loo is a PIA for it as well.

Same here downstairs WC aǹd we are near the sea too, do you think it might be tidal? :huray:


Don't know. Do you get surfers in the pan? :shock: :mrgreen:


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PostPosted: Wed Oct 18, 2017 6:40 pm 
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imho they look like there smothered in flux not wet, the copper should be copper coloured not black and tarnished you can see where the pipes have been wiped with a damp rag giving a glazed effect

There the worst I have seen in some time, my 15 year old niece could do a cleaner job

use Wire wool or a clean fit strip aka clean up strip and clean it up, I think Stevie wonder was the site inspector

edit. if it was wet it would have the green and white crusties


Last edited by Bob225 on Wed Oct 18, 2017 7:03 pm, edited 1 time in total.

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PostPosted: Wed Oct 18, 2017 6:46 pm 
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Dave54 wrote:
toolbox wrote:
Dave54 wrote:
Not saying either w~o or gas4you are wrong, but I think it depends where you are. We get it under the sink here, definitely no leaks etc. It's the damp climate down here near the sea. The cistern in the one loo is a PIA for it as well.

Same here downstairs WC aǹd we are near the sea too, do you think it might be tidal? :huray:


Don't know. Do you get surfers in the pan? :shock: :mrgreen:

:-P


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PostPosted: Wed Oct 18, 2017 7:01 pm 
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Dave54 wrote:
Not saying either w~o or gas4you are wrong, but I think it depends where you are. We get it under the sink here, definitely no leaks etc. It's the damp climate down here near the sea.


@ OP are you near the sea ? I only work around Verwood Ringwood (Not near the sea) Bournemouth on occasion...which is a bit nearer the sea...

Though the properties I worked on in Sandbanks didn't have that problem... https://en.wikipedia.org/wiki/Sandbanks

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