[Nelsond]

After a fair amount of fiddling I figured out the sequence for this on my 4400/4700

Step 1:  turn off "fresh water pump 1" on the breaker board
Step 2:  turn on "fresh water pump 2" on the breaker board
Step 3: Close the orange valve mounted on the aft side of the bulkhead forward of the water heater (just under the middle floor hatch in the cabin"
Step 4: engage auto fill switch in the galley

The actual solenoid valve for the autofill is located on top of the fresh water tank...you can see it when you open the aft most hatch in the cabin floor

Hope this helps

Thanks for sharing your “fiddling”.  I am familiar with Step 1 and 2, as they are outlined in my Tiara Owner’s Manual. (BTW, the manual states “Fresh Water Pump #2 (which is the water transfer valve switch”.) Why they call it a pump when it is a switch is beyond me.  I assume it is referring to the solenoid.  There is no mention of orange valve (Step 3) in the Manual, so I went to my boat, which is on the hard to look.  I don’t have any orange valve mounted on the aft side of the bulkhead forward of the water heater, however I did find a inline valve under the floor about 6 inches prior to the solenoid.  I think I am now aware of all the components, but will have it wait until my boat is back in the water to try getting the Autofill to work. Thanks again for your insight.