"Steve Barker" wrote in message
...
Well, I can't imagine there being a use for the L/R system in new
construction. It would be only in a repair. And if that is the case,
you'd just take it apart at the "accessible" union, and take apart
backwards to the problem area.


Right about the new construction, but in the case of a repair, it can still
be a very long run, with many turns, to the union. Why break 15 joints if
you can break three and get the job done?