Keggle Drilling...

[LooyvilleLarry]

Yeah, the dip tube (had a brain phart at the time). The problem I am having is that the half coupling that I have is not threaded all the way through (only 99%). So, attaching a NPT threaded anything to the inside of the coupling is not an option.

 

[Jared311]

Drilling the holes is a piece a cake with a bi-metal holesaw and some lubricating oil. I was worried that the holesaw might jump around and rough up the surround area so I drilled a hole through a 1"x2" board and clamped it down to use as a pilot hole. All in all, I can drill a hole in under 30 seconds!

 

[Bobby_M]

I didn't use half couplings, I used 1/2 inch FULL couplings. If you had half couplings welded in, your only option for installing a siphon tube is having the coupling replaced.