City Water connection leak (again)

RuthT

2017 T@B S, Always use a water pressure regulator (brass, attached to a filter and faucet combo) and for a second time we experienced gushing water when the city water was turned on. Water flows out the FRONT bottom of the trainer (both sides, driver and passenger) Filled the fresh tank through the filler (a messy operation but functional) with no non-normal dripping (that filler opening is soooo poorly designed). When I checked the space where the pump is located  I could see some water drops on the walls but could reach only far enough (did leave some nasty bruises on my arm) to barley check for a loose connection (did not seem to be loose). Is there anyway to get to this and find the leak? Last time this happened it cost me $95 at a dealer and I’m not really sure they did anything. Looking for another way to the space to work on those water lines (and perhaps a solution to the connection design as well as it seems to be a crimp clamp rather than a screw type. Yes, changed out the pressure regulator just in case it was bad, same results. All ideas welcome.

Sharon_is_SAM

ScottG was the first to do this:

https://tab-rv.vanillacommunity.com/discussion/8875/another-plumbing-leak-new-access-panel/p1

BrianZ

Welcome to the club, @RuthT!
Sounds like that pesky fitting on the inside of the city water fill check valve, though it could be from other connections like ScottG had on the toilet water line behind the wall.

See the below links where I show photos of tightening the screw-on fitting inside the wall at the city water port.  The only way I  could reach it was using my left arm, with my head down to the right of the toilet in our 2018 T@B 320S.  I later added the port hole for annual checks.  Thanks for the reminder, by the way.

Tighten Check Valve:

https://tab-rv.vanillacommunity.com/discussion/comment/113450/#Comment_113450

Created Port Hole for easier access:

https://tab-rv.vanillacommunity.com/discussion/comment/129577/#Comment_129577