As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.

Currently there is no insulation and the pipes are bare.

Is there any surface treatment or form of insulation that will reduce
the dripping?

On 13/01/18 20:42, Fredxx wrote:
As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.

Currently there is no insulation and the pipes are bare.

Is there any surface treatment or form of insulation that will reduce
the dripping?

keep warm moist air away from cold pipe.

- put something vapour proof around the pipe
- reduce the humidity in the kitchen

one, the other, or both.


--
"Women actually are capable of being far more than the feminists will
let them."

On 13/01/18 20:42, Fredxx wrote:
As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.

Currently there is no insulation and the pipes are bare.

Is there any surface treatment or form of insulation that will reduce
the dripping?

As you say - a decent closed cell insulation to reduce the amount of
warm damp air that can get onto the pipe.

Pop some insulation around it and tape the seam - or use some of this:

https://www.pipelagging.com/15mm-pip...s-o-black-foam


which has a built in sticky strip (it's a type I'm going to use for ease
of application).

But really, any closed cell foam lagging taped up so warm air can't get
to the pipe will do the job.

On Sun, 14 Jan 2018 19:08:45 +0000, Tim Watts
wrote:

..

Pop some insulation around it and tape the seam - or use some of this:

https://www.pipelagging.com/15mm-pip...s-o-black-foam


which has a built in sticky strip (it's a type I'm going to use for ease
of application).


Wonder if it uses the same adhesive as comes on the rolls of 3mm thick
armaflex tape ?
Before I retired I frequently used that for sealing gaps between
sections of lagging, when dry the adhesive sticks it like **** to
blanket but any moisture on the joining surface made it useless.
Anyone putting the slit lagging on a condensating pipe should dry the
pipe well first to minimise the risk of any moisture getting on the
sealing face.

G.Harman

On 13/01/2018 20:52, Chris Hogg wrote:
On Sat, 13 Jan 2018 20:42:00 +0000, Fredxx wrote:

As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.

Currently there is no insulation and the pipes are bare.

Is there any surface treatment or form of insulation that will reduce
the dripping?

They drip because the water in them is cold and the air around them is
humid, so the moisture condenses (but I guess you realise that). I
doubt that there's any surface treatment, but lagging with
conventional pipe lagging should do the trick, provided you don't
leave any bare pipe exposed. Stuff like this http://bit.ly/2Fz94pt

Thanks for the idea.

I was thinking along similar lines but this must be a common problem but
not aware of an equally common solution.

On Saturday, 13 January 2018 21:26:02 UTC, Fredxx wrote:
On 13/01/2018 20:52, Chris Hogg wrote:
On Sat, 13 Jan 2018 20:42:00 +0000, Fredxx wrote:

As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.

Currently there is no insulation and the pipes are bare.

Is there any surface treatment or form of insulation that will reduce
the dripping?

They drip because the water in them is cold and the air around them is
humid, so the moisture condenses (but I guess you realise that). I
doubt that there's any surface treatment, but lagging with
conventional pipe lagging should do the trick, provided you don't
leave any bare pipe exposed. Stuff like this http://bit.ly/2Fz94pt

Thanks for the idea.

I was thinking along similar lines but this must be a common problem but
not aware of an equally common solution.

too much water vapour in the air. Reduce it at source by changing cooking habits. If you can't peruade folk to do that then a dehumidifier would solve it.

Lagging would need to be airtight & vapour impermeable or it could very slowly saturate & moulder, depending on how much of the time condensation is occurring.


NT

On 13/01/2018 21:38, wrote:

Lagging would need to be airtight & vapour impermeable or it could very slowly saturate & moulder, depending on how much of the time condensation is occurring.

In theory yes but in practice the grey foam lagging I put on the cold
pipes under the kitchen sink nine years ago has been fine. I wrapped the
lagging in gaffer tape to minimise air gaps but it's far from airtight.

The temperature of the exposed surface of the brass stopcock is
currently 9 deg.C and the room temperature is 18. Even with a decent
relative humidity of 55% the dew point would be 9 deg C and condensation
would occur. The RH here is generally around 60% and the stopcock handle
is noticeably wet throughout the winter months but there's no sign of
any problem from the rest of the pipework.

--
Mike Clarke

On Sunday, 14 January 2018 10:40:59 UTC, Mike Clarke wrote:
On 13/01/2018 21:38, tabbypurr wrote:

Lagging would need to be airtight & vapour impermeable or it could very slowly saturate & moulder, depending on how much of the time condensation is occurring.

In theory yes but in practice the grey foam lagging I put on the cold
pipes under the kitchen sink nine years ago has been fine. I wrapped the
lagging in gaffer tape to minimise air gaps but it's far from airtight.

The temperature of the exposed surface of the brass stopcock is
currently 9 deg.C and the room temperature is 18. Even with a decent
relative humidity of 55% the dew point would be 9 deg C and condensation
would occur. The RH here is generally around 60% and the stopcock handle
is noticeably wet throughout the winter months but there's no sign of
any problem from the rest of the pipework.

then it's non-condensing enough of the time to dry off as well as get damp. The problem happens when it's not.


NT

On Sat, 13 Jan 2018 21:26:02 +0000, Fredxx wrote:

On 13/01/2018 20:52, Chris Hogg wrote:
On Sat, 13 Jan 2018 20:42:00 +0000, Fredxx wrote:

As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.


I was thinking along similar lines but this must be a common problem but
not aware of an equally common solution.



Only a small possibility but I once came across someone who suffered
excess condensation on a cold water pipe, it supplied the normal
kitchen cold and appliances but also an outside tap.
This tap leaked a fair bit and the householder not being on a meter
just lived with it as it flowed down a drain.
Once the water from the incoming main got colder in the autumn added
to the heating going on the constant through put of cold water caused
a lot of dripping.
Probably removed some heat from the house as well.

G.Harman

I did wonder just how humid and hot the kitchen is?.Do you have a lot of
people in the house, maybe some kind of device that chucks out warm damp
air, like a dryer with no external outlet, maybe a small leak in a hot
central heating pipe somewhere?


Other than that good ventilation and some lagging I suppose but really
unless its an industrial kitchen cooking most of the day, it does seem a
little odd to me.
Brian

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This newsgroup posting comes to you directly from...
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"Chris Hogg" wrote in message
...
On Sat, 13 Jan 2018 20:42:00 +0000, Fredxx wrote:

As per title, water is dripping from cold water pipes under a
worksurface in cupboards.

After drying these pipes water collects on these, finally dripping on
items below. Its not doing the cabinets any good.

Currently there is no insulation and the pipes are bare.

Is there any surface treatment or form of insulation that will reduce
the dripping?

They drip because the water in them is cold and the air around them is
humid, so the moisture condenses (but I guess you realise that). I
doubt that there's any surface treatment, but lagging with
conventional pipe lagging should do the trick, provided you don't
leave any bare pipe exposed. Stuff like this http://bit.ly/2Fz94pt

--

Chris

On 14/01/2018 16:35, pamela wrote:
On 08:36 14 Jan 2018, Brian Gaff wrote:

I did wonder just how humid and hot the kitchen is?.Do you have
a lot of people in the house, maybe some kind of device that
chucks out warm damp air, like a dryer with no external outlet,
maybe a small leak in a hot central heating pipe somewhere?

Other than that good ventilation and some lagging I suppose but
really unless its an industrial kitchen cooking most of the day,
it does seem a little odd to me.
Brian

If Fred's room temperature and cold water temp are the same as
everyone else's (which they probably are) then other people would
get his condensation problem on their bare pipes. But usually they
don't. As you say, it could be high humidity in his kitchen.

Depends how much pipe work (and whether it is ptfe or copper) located
inside the house and thus warmed up a few degrees before reaching the
kitchen.