by JVC8230 on Sat Apr 20, 2013 8:00 pm
To clarify how I got the nuts free, I used a cutoff wheel on my angle grinder to cut two notches on each nut. Consequently, this also notches the pipe nipple. This does not affect the nut's ability to turn freely. I then removed the small piece of nut and tapped the remaining with a punch and hammer to rotate it around the nipple. A little sacrifice saved about an eternity. No amount of penetrating oil or heat would have freed the nuts.