Originally Posted by Flybob
Most likely crud in the filter at the inlet. If you have crud there, you will most likely get some in the shower and the sink faucet screens.
I had the same problem on my first outing with my new Forester RV. I took it back to the dealer and they told me that a valve under the"dresser" was turned off. That was strange as the toilet worked for three days before it stopped. Then two outings later it stopped filling again. Took it back to the dealer and they told me something involving the foot pedal was broken and they ordered a repair part. A couple of more outings and it stopped again! This time I removed the toilet and found that the screen that would filter out particles was completely clogged with what looked like ground up plastic! I reversed flushed the toilet and put it back on. I investigated whether or not something was in the fresh water tank and found that it had a filter which was 100% clean. I forgot to mention that both faucets on the sink kept getting clogged up with the same media.
After the third clog I installed a bidet filter ahead of the water going in the toilet and after about 10 days of use it too clogged up. I then ordered on Amazon a filter that had a spin off clear bowl (like they used to filter the gas lines in the 40's). I have had to clear that sediment bowl only once and it now appears that all of the media that was in the lines has now been removed. Lastly, when I tried to drain the water out the drain lines were also clogged and they would only drain when I used the water pump to pressurize the system.
I am confident that the problem was the rig was delibertly sabotaged at the factory by an unhappy employee. What the dealer told me the problem was for the two times they "repaired" it was a lie.