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i like the free stuff that i got when we went to lead free. i took every free sample that was offered. i'll be go to hell if i can tell the difference. same with the new flux. all i do is repair. i'm on may last roll so i my have to buy some. 2 big tubs of flux left, should be good for life there. breid...................
Last edited by breid1903; 02-08-2010, 06:45 PM.
Reason: i'm illiterate
i'm assuming you're referring to brazing. 1100+ degrees.
we use to do all our mains with a t-drill and because the socket was only 1/4'' deep, brazing was required. but then we started to braze all our joints on the main. it was not unusual to have 6'' and smaller copper mains.
the neat thing was the lack of prep time as there was no flux to worry about. with the new water safe flux. this flux doesn't do well after a couple hours on the pipe or fitting. the days of prepping and falling back to solder are pretty much gone.
also as noted from dunbar. when copper is heated to that temperature, the copper gets annealed and softens. the line will move if not properly supported, and even with good hangers, they still move.
the rod, 5% silver is not cheap either. 5% had the best pasty range. nor is the oxy accy torches and gas. plus when brazing all day long, touching a hot pipe while trying to get the torch into position was always a concern. we all had a burn on our inner arms.
brazing brass fittings were also a no, no for us. we tried it, but found that the heat would melt the lead in the fittings and cause pin holes to develop down the road.
medical gas requires brazing, but it also requires a nitrogen purge and a med gas license.