Drip from front passenger exterior during winterizing

immanence · November 2025

Image: https://us.v-cdn.net/5021717/uploads/editor/5p/yi8gc3us4cji.jpg

The drip is kind of hard to see, but it is right on the edge there and it seemed to be running from the j track or trim. It was a slow drip, but definitely a steady drip during winterizing using the blow out method.

It is possible that this is normal and I just haven't noticed it before, but can anyone confirm? I was worried I blew a seal somewhere (though I was only using 40 psi), but I couldn't find any water on the interior of the trailer. So maybe this is a natural drip line from one of the valves?

Thanks for any thoughts!

qhumberd · November 2025

@immanence I can see the spot that appears to be in front of the door on passenger side of trailer. It would help if you identified the model and year of your trailer. In my 2019 400 that area has no plumbing inside the wall until you get to the sink area on the other side of the door, so I would would have to be tracking down water that is tracking along the frame.

What configuration is your trailer?

immanence · November 2025

This is a 2022 tab 320

SLJ · November 2025

Any leaks in the front can come out either front corner. Remove the panel access on the toilet and check all the lines and check valve for the shower. My '21 was built in February and the first time I put water in, that black plastic check valve was cracked and I had to replace it.

Mobean · November 2025

Is the trailer level? If the drip is at a low point, the leak could be originating from a remote location.

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Drip from front passenger exterior during winterizing

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2019 T@B400 Boondock Lite "Todd"