Ignoramus4371 wrote:

On 2010-12-04, RBnDFW wrote:
OK, so I got a deal - Like new 60-gallon Kobalt compressor for $125 on CL.
He said it had a hole in the tank, but he couldn't find it.

So I got it home powered it up, and sure enough, there's a hole in the
bottom It's about 1/16", in the weld area adjacent to the large drain
bung at the very bottom.
Now, this thing looks brand new. I really don't think it's rust
perforation. the paint wasn't bubbled, and there is no rust at the edges
of the hole. i think it was just a porous weld. Anyway, I'd like to fix it.

Here's what I'm thinking: Drill out to whatever diameter gives good
thickness.
Tap it, and screw in a bolt.
Then either braze or silver solder

Better suggestions welcome.

It may be a crack in steel. I had a compressor tank that had such a
crack. You need to examine it closely.

i

Since those tanks normally have a big 2" port on the side, you can
remove the fittings from there and inspect inside with an inspection
mirror and a flashlight.

Definitely recommend carefully removing the paint from a good area
around the leak for a close inspection for cracks or other issues.

If you can, try tapping to something like 1/8" NPT and put in a tapered
plug with some Rectorseal and skip any heating process like
welding/brazing/soldering.