westend wrote:
Introduce compressed air into the loose supply hose, slowly. If you have a piece of plastic in the tank, the air will blow it away from the tank outlet. You can also use an electrician's snake but be careful not to get it caught in the hose because you'll have another project to deal with.
I'm assuming it's a big problem to get a clear view of the tank and outlet. Observation at the outlet would make diagnosis easier and you may find the blocking culprit.
That did it. A little air pressure applied and it reopened very quickly. We’re back in business. Thanks for your help.