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Old 07-06-2021, 07:07 AM   #1
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Water leak in kitchen slide

Hello everyone,

We have a 2018 300BHS that has been relatively trouble free. It's been parked at a seasonal spot for a few years and this year when we fired it up I noticed a drip outside by the fender on the slide side (drivers side).
At first I thought it was no big deal, figured it would stop as it may have been rain run off or whatever. Well it never stopped, and when I dumped the tanks I took better note of where it was coming from.

This past weekend I opened up all the fake lower cabinets to find water collecting on top of the wheel well. The strange thing is everything seems dry above. I can't find a leaking fitting, or water drip coming from above. When I lift the PEX lines off the fender it is wet under them, and the staining on the top of the fender tells me this has been happening for a while.

We had guests coming out so I couldn't spend more time on it unfortunately :/

Any other 300BHS owners come across a problem like this?

I also noticed our kitchen drain gets kinked when the slide is fully extended, I'll have to see if I can straighten it out somehow.

I wish I took photos to share, I'll try and remember next weekend.
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Old 07-06-2021, 08:08 AM   #2
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water under the lines might you an indication of the leak elsewhere and running down the line. follow the lines out to check. also make sure you correct the kink problem good luck.
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Old 07-14-2021, 11:02 PM   #3
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Originally Posted by SeaDog View Post
water under the lines might you an indication of the leak elsewhere and running down the line. follow the lines out to check. also make sure you correct the kink problem good luck.
You would absolutely think that but I couldn't find any leak from above.

However, new twist to the story.
We went out again this past weekend and I took a look at everything once more to see what I could find. And to my surprise the whole area was dry.

After looking it over a bunch the only thing I can surmise is the cold water line must have been resting on the inner fender liner and condescending.

Two things had changed since the leak started and stopped. First, the temperatures (and humidity) were not nearly as high as when the leak was first noticed. Second, I moved the piping around when I was looking for the leak. It's possible I moved them enough that they were no longer contacting the fender. They're just zip tied to the abs drain that runs through there.

Either way I'm going to have to keep monitoring it to see if it comes back. I'm thinking about insulating the cold line the best I can in the slide, or just wrapping a larger diameter insulation around the whole thing.
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Old 07-15-2021, 05:39 AM   #4
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Re you able to see any PEX fittings/crimps in the general area?

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Old 07-24-2021, 09:10 AM   #5
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Re you able to see any PEX fittings/crimps in the general area?

Bruce
Absolutely, but everything looks dry.

I finally remembered to take some photos of the space.

The dripping on the exterior is again not present, but after removing the cabinet bottoms I can see that there is condensation on the lines again.
You can see the pex fittings in the shot look dry, and looking in front the right hand side you can see everything looks dry. Once you get over the center of the inner fender that's where you can see some pooling.

I keep coming back to the cold line condensing and dripping, I just don't see any other way this would suddenly start and stop.

I am not sure why the photos loaded upsidedown
I tried editing them and flipping them 180 and they still load upside-down. Not quite sure what the issue is, they display correct for me on my devices.
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Old 09-06-2021, 06:02 PM   #6
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Finally had some time this weekend to investigate this further, found two 90 degree fittings that were both leaking in the cabinet above where the water was collecting.
I'll post a few photos of each. Looks like it's been leaking there for a very long time as there was RV antifreeze residue on each of the fittings.
I ended up just cutting them out and replacing them as each one was as tight as it could go, and was leaking from not only the threads but the flare/seal too.
Once I was done messing around in there the kitchen faucet leaked, but thankfully the fittings were not even hand tight.
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