[dilligaf]

is there any particular reason you are looking for galvanized steel rather than plastic or another form of cistern? Leaching of metals and such can be a problem in certain areas with the galvanized and they are not completely weather resisitant .

Rainwell products carries them

 

[dilligaf]

we built ours out of concrete block,coated it with damtight and its been trouble free for nearly 25 years..