Need some compressor help.

I have a Kobalt K 7060HFV stand up compressor.  It started when the air hose leaked because it hung over a bar and got cracks in the outside diameter.  No problem, the compressor runs more and I disconnect the hose when done. 

Now the tank leaks!  I was afraid water froze in the bottom and split the tank, but it was just the gasket at the bottom of a plug.  Problem dujour is locating a gasket.  It's Sunday so I've only tried NAPA and a local hardware store, the interweb isn't giving me anything, even Kobalt.com

The center hole is for a 1/4" NTP petcock for draining.

If you have suggestions I'd love to hear it.

The threads you show are NPT, so it's just a trip to the plumbing aisle at HD.  Pick up some teflon tape and an adapter to go from [let's say] 1/2" NPT to female 1/4" NPT and call it a day.  I often pick up a 1/4" or 3/8" ball valve to replace the petcock since they're much easier to open, but be aware that ear protection is strongly encouraged.

My current Craftsman is a horizontal 2-stage, and my bung was 3/8"NPT.  I picked up a 3/8" NPT street, adapted down to 1/4" and installed a 1/4" ball valve sticking out sideways.

Edit to add:  I always leave my valves open enough to allow a teeny leak.  That way it is self-purging.  Any water that condenses will fall to the bottom and eventually drip out with the air.  That way I can never forget to drain the condensation out of my tank.

Is there a recess in the tank for that O ring to sit into?  The plug may have just unscrewed enough for the O ring to blow out.

It is unusual for a pipe thread plug to have an O-ring, as mentioned Teflon tape or pipe dope should be able to seal the thread connection.  If an O-ring is required, check Ace hardware stores in your area, they typically have a large assortment of O-rings available in the hardware section.

If you have your heart set on an O-ring and you can't source it locally, oringsandmore.com can fix you up.  Reasonable minimums and reasonable shipping.

I'm not sure that is NPT, it looks more like the end threads that have been exposed in the tank are corroded. 

If it is NPT and the hole in the center is for 1/4NPT (~1/2" diameter) that is a pretty large adapter. 

I would guess it is o-ring boss. 1-1/2 tube size would measure 1-7/8"-12 thread, 2" would be 2-1/2"-12.

straight thread o-rings | McMaster-Carr

Wow, good info.  Thanks!   BTW it tool two guys a bigass pipe wrench and a 4ft. pipe to wrestle that big plug off. 

I am replacing the center 1/4" NPT straight down bleeder type drain for a 45* 1/4" NPT, then to a 6" nipple with the bleeder at the end, putting it closer to the outside edge of the tank.

Dan

Well, some skuffs and a hole in my forearm later, I fixed the plug leak.  =~ )

It's NOT THE GASKET !!    =~ 0    There's a pinhole in the tank about 1/2" away from the plug.  Frustrated, I went in the house, cleaned up, Mrs. 914 says, "Not going well?"

I told the tale, then the CFO suggested just buying a new one.  What?  Is there a pod in the basement?  Who the hell are you and where's my wife?

So Options:

1.  Just buy a new one.  Maybe sell the good everything else.

2.  Disassemble the thing again and buy a new tank (if available), reassemble.

3.  Disassemble, weld the tank up and reassemble.

WWGRMD?

The tank is scrap with a capital S.  If the internal rust is bad enough for a pinhole leak to form, then it's a time bomb.  More like a grenade with the pin pulled and the spoon in your other hand.

Does anyone have experience with this DeWalt?   Almost exactly what I had, just brighter.

Here's the old compressor going to the scrapper, and below is the hew one with a hose reel.  =~ )

Pete. (l33t FS) said:

The tank is scrap with a capital S.  If the internal rust is bad enough for a pinhole leak to form, then it's a time bomb.  More like a grenade with the pin pulled and the spoon in your other hand.

Came to say this but Pete summed it up perfectly. Nice looking new unit!!!   

Nice!  But did you add a ball valve to the bottom of the tank so you could drain it?