Water leak under bathroom sink

cwhite3389 · 01-22-2021, 08:43 AM

2016 2106 FBS, I had water on the bathroom floor where the door meets near the refrigerator. I keep a towel on the floor and it was almost soaked through. I took the panel off under the sink and there is water under there but no dripping. I am hooked up to the campground water, nothing in my FW tank and the pump is off. I turned on the hot in the bathroom sink and found a leak coming from under the vanity. Only when the water was on! I made sure all the fittings were tight, but still leaks. I turned on the kitchen water and it leaks. I can't get under there to see what it is, but there appears to be some sort of box that has the pex lines running to it. Also, it's been cold (I'm in Central Florida) but not freezing. Any suggestions???

be happy · 01-23-2021, 04:46 AM

Bathroom sink. You say it only leaks when the hot water is turned on and it does not happen when the cold is on. I would get under the bath sink turn the hot water on and see where the leak is coming from. I would guess that the connection between the water line and the faucet is not tight or when installing they cross threaded the connection. That would give you the its tights feeling but may still leak. Or there is a crack in either the incoming line or the faucet.

With out being able to look under the kitchen sink one would really be guessing. You really need to find out where the water is coming from, as it will only lead to more destruction in your unit.

backtrack15 · 01-23-2021, 08:28 AM

Are you using a pressure regulator on your connection to the campground water supply?

cwhite3389 · 01-23-2021, 10:15 AM

Yes, it is regulated.

backtrack15 · 01-23-2021, 05:16 PM

The kitchen is hard to diagnose based on what you have said so far. For the bathroom, since it only leaks when you actually run the hot water, it seems like it could be an issue with the faucet valve itself. If there is no other obvious source, I’d be tempted to replace or rebuild the faucet (if possible).

Morich · 01-23-2021, 06:45 PM

Quote from OP:
I turned on the hot in the bathroom sink and found a leak coming from under the vanity. Only when the water was on!
Doesn't this actually fit a drain leak? Something as simple as the plumbers putty where the drain fits into the basin?
But the real problem is that the OP can't get under to spot the leak so there is little reason to begin to fix it as that is certain to be quite a lot more difficult than a simple look!
If we can't see to spot a leak, the only other alternate is finding somebody who can.
Forums can give advise but they are really no good at twisting a wrench!

backtrack15 · 01-23-2021, 06:58 PM

Quote:

Originally Posted by Morich

Quote from OP:
I turned on the hot in the bathroom sink and found a leak coming from under the vanity. Only when the water was on!
Doesn't this actually fit a drain leak? Something as simple as the plumbers putty where the drain fits into the basin?

Good point. I read too much into the comment about hot water... assumed it was only with hot water running (not an issue when running cold).

Wyatt · 01-23-2021, 08:22 PM

I can’t imagine that it’s not the faucet valve itself. If the incoming hot water line was leaking at the connection to the faucet, then it would leak whenever you hot water lines were pressurized. Since it only happens when you turn the faucet valve on, seem like the faucet’s valve itself must be the culprit.

On a side note, you said you’re using a regulator, but didn’t say at what pressure?

Morich · 01-23-2021, 09:34 PM

I feel there is more being read into what the OP said than what I read. I read it as saying there is a leak when the hot water is turned on but I DO NOT see anything about what happens when the cold water is turned on or off!
From my read of it, we don't know if the cold water would also leak out the drain if it were turned on. It " could" be a crack in the body of the faucet but those are not something I've seen, while drain leaks are very common so I have to go with checking for a drain leak first.
I feel the leak is only seen when water is running down the drain! I'm betting the same would happen if they pour a bucket of water in the vanity! If it is the style that uses a "popup" drain, the fitting at the back where the lever connects would be a place to check.

Rustyturn · 01-27-2021, 05:57 PM

I had leaks in similar places. Everywhere that there is reinforced tubing connecting to PEXS leaks. The crimp connectors are not sufficient for this kind of connection. I replaced some with Sharkbites and put hose clamps on others. The reinforced hose is not the same size as the PEX. Mine leak where connections went to the outdoor kitchen and when there was trailer movement the water would roll out by the bathroom door between bathroom closet and refrigerator. Also, leaks under kitchen sink, at water heater under bathroom sink, and where blackwater cleanout comes through exterior wall. I am watching shower and expect leaks there next. This is discussed in another thread on this forum.
"2020 View plumbing leaks" Dated 1/11/2021
https://www.winnieowners.com/forums/...ks-359882.html

DAN L · 01-27-2021, 08:54 PM

On my winne they is a "backflow preventer" under the sink which leaked.
Home depot and Lowes stock this item as well as Rv dealers.
My p v was high on the wall to the left of the sink. I had to take the drawers out to find it.
Darn spelling checker!

Wyatt · 01-28-2021, 01:36 PM

Quote:

Originally Posted by Morich

I feel there is more being read into what the OP said than what I read. I read it as saying there is a leak when the hot water is turned on but I DO NOT see anything about what happens when the cold water is turned on or off!
From my read of it, we don't know if the cold water would also leak out the drain if it were turned on. It " could" be a crack in the body of the faucet but those are not something I've seen, while drain leaks are very common so I have to go with checking for a drain leak first.
I feel the leak is only seen when water is running down the drain! I'm betting the same would happen if they pour a bucket of water in the vanity! If it is the style that uses a "popup" drain, the fitting at the back where the lever connects would be a place to check.

I assumed that he gave us the information about the hot line because that’s where he had the issue. I agree, if it happens when he uses the cold line too, that it’s more likely the drain, but he didn’t weigh in in that.

Still waiting...