City water Leaks at inlet.

Here's what I would do: remove the inlet from the trailer side. It should pull out enough to disconnect the inside water line. If it won't, disconnect at the other end. You have to get it completely loose from the trailer.

Once you've got it out, do a bench test for leaks. There are several reasons that the inlet will leak. One is that the inlet or check valve may be faulty. The first thing to do is remove the check valve. (some are not removable, so be sure which it is) Attach a hose and regulator to the inlet. Cap or plug the output. Turn on the hose and see if it leaks or not.

If the inlet leaks, it is most likely faulty. If it holds, then it is OK.

NOTE: Use tape on the threads and teflon pipe thread goop over that if you have to re-insert the check valve or on any other pipe threads. Depending on the type of fittings used, some do not need sealants. (the type with rubber gaskets or flared fittings)

At this point, connect a line to the inlet. You can use the line in the trailer if you have leeway to pull it out far enough. Otherwise, a new line and fitting would be best for this test.

Another reason things leak is over tightening, believe it or not. It's tempting but try to get the fittings tight but not to the point of not being able to turn. Test at the trailer, and if something leaks (it should be a drip, not a spray), tighten 1/4 turn and see if it helps. Continue until it stops leaking.

Finally, place a clean paper towel under any joints. If there is even a tiny leak, the paper towel will have a damp spot... Feel up the line until your fingers get wet.

I hope this helps you. Once you get the "feel" of plumbing, it's easy but takes a little while. Good luck!

Well, I've never seen an inlet like that. It appears to be a common plumbing fitting. I think you may be right that things may be backwards. In any case, buy an RV city water inlet. I believe your problems will be solved.

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