Wow you tried everything except a divining rod to get water. Ha! In my coach the FWT is higher than the pump so gravity “helps” to fill the pump prime side, but anyone that draws pink plumbing antifreeze into their pump in Fall (from a bypass line stuck into a jug of pink on the ground) knows that the pump is self priming (if its working) and will pull liquid also (if no air leaks exist). The critical thing is no air should be drawn into the pump prime side. So if the pump filter or water line connections leak air not much if any water will go through the pump in my experience.
It sounded like you cleared your FWT blockage OK. If you have cleaned all bits from the pump filter and water lines between the FWT and pump/filter and all is leak free (no water leaking and no air getting in; feeder valves open).....that only leaves the pump. Perhaps some debris also got into the pump but hopefully the filter prevented that. This can be frustrating for sure and being under warrantee helps. Waiting in the Spring Dealer lineups might be equally frustrating sometimes though. Good luck.
__________________
|