I have a 1981 Euro Glassnose. It has two fresh water tanks, one under the bed and another under the fridge. I can fill the one under the bed from the city water hookup, but can't figure out how to fill the one under the fridge. There is a line that runs from one to the other, but it seems to take forever for the water to run to the front tank. I'm sure I'm missing some simple thing! I would appreciate any help you can give. Thanks!

Our 86 regal has same set up. If you follow the water lines you should find that they are just connected together. I found goo pluggin up at the 90 deg fitting. Pulled both tanks out, cleaned out with bleach water mixture-then boiling water.
Flushed out lines and fitting. Now both tanks fill great. After reinstaling tanks add bleach and water, run thru system, drain and flush with fresh water a few times. I had to cut and resplice my level sensor on tank under bed.

Doorman

Jeri, one thing I forgot to mention in prev. post is there is also some fine mesh stainless screens in the fittings that go into the tanks