Fresh water tank leaking

While camping this past weekend I noticed water dripping from the fresh water tank. Upon inspection it looks like there is a crack around the drain plug where it meets the bottom of the tank (see pic). From the pic it also looks like there is a failure in the silicon (or other caulking material) that binds the flange of the plug to the tank. But I’m not sure about this, maybe the crack is a brittle failure of the tank plastic.

Anyone knows what’s going on here? I’m contemplating slapping some silicon caulk on there to see if it holds.

Also, I was hooked up to city water at the time and the tank was empty prior. I thought city water supply bypassed the holding tank? Am I misunderstanding something here?

Thanks

Pres

The water back-filling when hooked to city water would most likely be a check valve problem. The location of that varies a bit depending on the R-pod model.

Ok so it unanimous, don’t use silicon and look for someone with plastic welding experience. Any recommendation for the Houston area? No one suggested a new tank... too expensive?

I’ll try the remedy suggested for the valve reset this weekend.

Thank all

Originally posted by GlueGuy There are a bunch of links all over the web about how to repair a polyurethane water tank. I just looked at this one, and it looked like it might actually work:  https://www.youtube.com/watch?v=5hEEsdrKieg This one might be a better bet that could actually work in your situation. A DIY poly welding kit: https://www.youtube.com/watch?v=u829qLroshw

Ok well I have some options, I’ll have to decide which one fits my skill set best . Thanks for the research and advise everybody. Now I just have to find the time.