Or you can do what
I did. Go to your local fire extinguisher service/refill place, and
check for one of their reject bottles that is about 1 1/2 quarts. These
are lightweight aluminum bottles, usually painted red. On mine I was
able to just peel the paint off, no paint remover required. I bought a
cap neck from one of the on-line specialty shops, and took it to my favorite
aluminum welder for welding on to the bottle. Result is a nice
lightweight tank that was the right configuration for me (see photo).
Also installed a low-level switch.
--Good craftsmanship on the tank and all in the pic
looks good, what are the sensers I see in the pic?
Wendell