i have a 20long just like this and bought it a yard sale took it home, set it outside in yard a few weeks to see if it leaked and it didn't leak ,....
well, i put it up in my wheel barrow so when cutting grass nothing flew out to crack it, as i had not cleared out a place for it yet,..
my pony got out and decided to drink from it and before i got a chance to bring it in she knocked it over,
and the end panel of glass cracked sort of like a web, could be used for mice or what ever or if some one can re glass it, for i can't,
i'm near pittsburgh pa,..