Thanks so much everyone I really appreciate it. Rigid it is
I am a heavy machinery mechanic/half *** plumber/hald *** HVAC technician. (world wide emergency rental company)
I have gotten rid of all my pipe wrenches except a 48" rigid and an 18" chain wrench. I picked up the some of the snap on Pipe Wrench Pliers a few years ago. They are also called swedish pipe wrenches. Bahco makes the same ones as the snap on's, except the grip is cheesier. a few other companies make similar ones, but they don't work as well.
there is not a better tool for removing cylinders. I have two pair of the PWZ1's, pwz2's, one pair of pwz3's and the pwz4's. the 3's rarely get used. they open wide, but lack the length to get alot of *** on something like a glad nut. the pwz4's are more suited to that. I use the pwz1's and 2's on everything from 1/2 npt fittings up to 2" ball valves.
They are expensive. they adjust easy, are so much easier to get into hard access places due to the design on the head. they work as a large crescent wrench also and won't mar nuts and fittings like a pipe wrench would. the 1's and 2's are excellent for hydraulic lines and fittings. I literally cannot praise these things enough. my coworkers have bought the cheaper bahco versions, and after having mine, wouldn't buy them if I had to.