Water leak under kitchen sink

[DonnaD]

I have a water leak under the kitchen sink. It seems to be wet under the tank that is under the kitchen sink. Any ideas?

[chuckster57]

Welcome to the forum!!

Let’s start with a couple questions, tank? Does it leak only when faucet is running?

[DonnaD]

It leaks when the system is pressurized

[chuckster57]

It could be simple as tightening the fittings. Have you determined exactly where the leak is? We use a flashlight and look under the sink with the system pressurized. That way you can find the exact spot.

[DonnaD]

What is the tank surrounded by styrofoam? It’s wet under there

[DonnaD]

I will try and look with the flashlight

[chuckster57]

What is the tank surrounded by styrofoam? It’s wet under there
Probably the water heater. Is there a blue line connected at the bottom and a red line at the top?

Year of RV?

[DonnaD]

I will have to have a look. Thanks I will let you know

[chuckster57]

Ok. I’ll be waiting.

[sourdough]

If it is wet under the styrofoam enclosed tank (should be the water heater) it cold be coming from a connection above it and it collects under the foam encased tank or..... I experienced the exact same thing 2-3 years ago. Checked fittings, pex etc. and found nothing but the water kept collecting. Pulled the water heater (ours was inside a built in enclosure in the closet and exited through the outside wall). After removing it and checking it out I found a hairline crack (you couldn't actually tell it was there until the water started seeping out of it) down the side from one of the welds (Atwood). Repair was to replace.