by MacStill » Tue Jun 04, 2013 9:11 pm
I use the TS4000 for 95% of all my soft soldering, even on 4" pipe.... it's a very versatile and forgiving torch with a wide range for heat, also very good for those little joins too.
The TS8000 I have mainly sits unused, but comes in handy for brazing and annealing smaller >2" pipe & soft soldering 4" to 6" pipes.
For soft soldering >50mm pipe you can easily get away with the cheaper Bernzo $20 torch and propane, the propane bottles sound expensive but they do last a long time.
I prefer all of the above to a hose from a bottle style torch, I find those cumbersome with less maneuverability ;-) the more comfortable you are with your torch while soldering the easier it is, and also helps with the quality of your joins.... the less filing the better IMHO