Well ........ guys, guess what: I just minutes ago disconnected my leaking Tetford toilet fresh water inlet valve from the toilet bowl and then pressure tested it with the water pump turned ON and the water line still connected to it. Removal took about 20 minutes using a headlamp and a mirror - no toilet bowl removal necessary (the same approach I used the first time 3 years ago with the first failure).
There it was -> an ultra-fine spray/mist coming from an almost invisible hairline crack within the rim of the plastic male connector that the incoming water PEX line male connector screws to. Just like last time with the original water inlet valve assembly!!!
Remember - I mentioned earlier that the replacement valve assembly that I installed 3 years ago used a different material (black plastic) for the plastic male connector that the incoming water PEX line male connector screws on to ... AS IF Tetford was trying to address a material failure problem at that time. The original plastic male connector on the original valve was a yellow-white color - looking like it was teflon.
If Tetford was trying to fix this issue of micro-cracks with a material change ... it didn't work ... and our recent RV adventure to Utah and Colorado suffered because of it.
I'll call Tetford tomorrow and try to find out what's going on with this part.
I wonder how many other RV'ers have a failed toilet inlet water valve like this and don't realize it because the drops of water from the ultra-fine spray merely drops directly down and out a crack onto the ground without wetting the floor around the toilet enough - or at all - so as to even notice it? (They may not be paying any attention to the occasional burp from their water pump while this is going on.)
