How I know how much water is in my tank
Not the gas tank, of course ... the fresh water tank!
This one is for those who have the late 60's/early 70's Westfalia icebox with sink. Those with other setups will have to do their own research.
I always wondered how much water was in the tank, so one day I drained it completely and added water in gallon increments, marking each level on a wooden dipstick. The dipstick is about 28" long 1" wide, and maybe 1/4" thick, and is made of a wood that shows clearly which part is wet and which is dry. (Mine is made of a piece of scrap mahogany, but other woods open-pore woods like walnut would probably work).
Find a nail that's longer than the filler opening is wide. Drill a hole in the dipstick the same diameter as the nail, and insert the nail. From the hole, measure out and label the following distances:
8 gal -- 2"
7 gal -- 9 5/8"
6 gal -- 12 7/8"
5 gal -- 16"
4 gal -- 19 1/4"
3 gal -- 22 1/8"
2 gal -- 25 1/4"
To use it, just push it into the tank until the nail makes contact with the filler. The water level is easily read by noting where the dry area ends and the wet area starts.
Sacramento, CA USA
Former buses: '61 17-Window "Pink Bus"
'70 Frankenwestie "Blunder Bus"
'71 Frankenwestie "Thunder Bus"
Current bus: '71 Dormobile Westie "George"