Well Robert you have taken away all of my fun as you have pretty much diagnosed your own problem. Since you do not tell me what brand toilet you have I am going to have to give you a general answer as to what the problem might be.
If you are lucky it is just a loose water fitting that needs to tightened on the toilet itself. If you are sorta lucky it could be a leaky hose that has to replaced or repaired.
If you are not so lucky it could be a leaky Ball Valve or Flush Valve that needs to be replaced. There are other problems that could be causing the leak as well, but those other problems vary by type and brand of RV Toilet you have.
Bottom Line: You are going to have to jump in and dig deeper (pun intended) to find the actual leak. Once you find to leak you are going to have to buy the RV Toilet Repair Parts that you need to fix the problem.
I hope this helps.
Do you have any suggestions or comments on this topic? You can add them to this page by clicking on the "Click Here To Post Comments" link located near the bottom of this page.
Everything-About-RVing.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.