Flush tank fill question
Thought filling the flush tank would be like falling off a log, but ran into an issue. When prepping the toilet for a trip, I wanted to fill the flush tank by first swing the hinged fill tube out. I removed the cap and added water and it filled virtually right away yet the sight tube is empty. At present, there is water almost right to the top of fill tube and again, only condensation visible in the sight tube. It is a Thetford model 402C I believe.
Am I trying to fill the flush tank using the wrong fill tube? Another problem?