I actually have a similar issue and can't find a leak anywhere. Everything is dry except there appears to condensation on the faucet hose. I just didn't think that much water could be produced as it is a small pool of it. We have had an unusually hot past few days and this is the first I noticed it. I am not sure how to insulate the hose thouse as it has to pull up out of the sink with the sprayer. Any thoughts?

Hi, I am experiencing a similar problem in that the cold water pipe underneath the sink is constantly covered in condensation and this has only occurred in the past couple of months.

When I clean the pipe and dry it there doesn't appear to be any leaks ,however the condensation soon reappears starting from the bottom of the pipe.

I have tried using an insulation tape however this didn't work and what's even more annoying is the smell of stagnant water but again once the pipe is dried and cleaned the smell goes.

HELP!!

When you say the "bottom of the pipe", which pipe are you speaking of, the drain line or one of the supply pipes?

Curde2001, I assume you have single column kitchen faucet with Pull-out spout. This spout is connected via flexible metal hose. If that's so, than...

I don't think you have condensation on pull-out hose. More likely, you have leak. Most of the time. The leak is caused by lose handle or worn out washer under the handle. See if the handle is tighten up all the way and if the washer is OK. Then, you could have leaking hose. Water drips into the pull out hose and then into your cabinet.

The condensation happens when hot water enters very cold pipe or when very cold water enters your house plumbing. Your faucet and pipes are inside the house, therefore is under room temperature.

Do you have any Booster hot water tank under your sink ? Do you have Hot Water Circulation system installed in your house ? How cold is your cold water when it comes in from the street ? Do you live in the North where it gets very cold ?