Brazing tubing after a fitting has been installed should be avoided at all costs. Minimum brazing distances below apply to pre-brazed tube sections as well. If field brazing, conventional precautions should be taken to ensure fitting remains cool.

Minimum Distance From RLS Fitting To Braze
1/4 to 1/2 Tube Diameter = 5 in / 127 mm
5/8 Tube Diameter = 7 in / 178 mm
3/4 Tube Diameter = 8 in / 203 mm
7/8 to 1 Tube Diameter = 9 in / 229 mm
1-1/8 Tube Diameter = 12 in / 305 mm
1-1/4 to 1-3/8 Tube Diameter = 14 in / 356 mm
1-5/8 Tube Diameter = 16-1/4 in / 413 mm
2-1/8 Tube Diameter = 21-1/4 in / 540 mm