Captain Skip ....wrote: "I tightened the connection on the incoming hose to what I'm assuming is the check valve, cleaned up all the spilled water and tried again.....nothing. No water went into the tank. I kept the toilet open so I could see - nothing. What else do I need to do? "
I would suggest perhaps that the 'check valve' is seized.
You can try and take it apart and see if it is working or replace it.
That was too bad that you had to deal with the water spraying everywhere.
hope this helps
'07 WildCat 30 RLBS ~ West Coast Edition ~
Trail Air - Tri Glide Pin Box
2000 F350 DRW 7.3 Diesel Lariat 89k miles
Edge programmer, 4" SS exhaust turbo/back
Vancouver Island, B.C., Canada