Vintage Sanborm air compressor has NO drain valve!
by Chris C.
I just acquired a vintage Sanborn 10 gallon air compressor with a small piston pump and 3/4HP 120V electric motor.
After adjusting the loose pulleys that made it so loud when I got it (no doubt the reason I got it for $20!), I noticed there is no drain valve whatsoever on that tank!
Since it can't possibly be, otherwise the tank would be full of water by now, I was wondering whether this tank didn't have some sort of an automatic drain whereby the air is taken from the bottom of the tank so it can never accumulate there (it would be essentially siphoned out through the air hose)
Am I missing something there or do I make sense?
I looked carefully on the tank and besides the outlet from the compressor pump there are no bungs whatsoever to indicated that perhaps a former owner closed one up, no repair welds either. It used to be red, now it's green.
Model is 44A75-10
Any advice would be greatly appreciated!
Chris C. in Montreal