Nick
The tip of the funnel has molded threads. So does one end of the extension. It’s a set. The extension is maybe 18 inches without putting a tape to it. Perfect length for my pilothouse model. The extension bends into the water line just far enough to be secure, and channel fluid down.
If you are still hanging around Kent Island, go to Western Auto in Stevensville. (Western Auto as a franchiser died a long time ago but that location kept using the name. Well known and identified in this area)
For what it’s worth I’m using Everclear grain alchohol 195 proof. Pure grain. Mix in 2 more jugs of water and it approximates the alcohol content of vodka. Mix in a few drops of food color into each jug and you can see progress as you run it through lines.
Liquor stores in the area will understand exactly why you need it. You won’t be the first guy looking for it.
10 gallons total fluid is the minimum I need. I used a bit more to be safe. 7 half gallon jugs of grain minimum.
Come the spring if the flushing is imperfect I’m drinking booze instead of antifreeze. And in the meantime any germs in the tank get zapped.
If you need a second pair of hands to help drop me a line.