A: No, this tool is for use with 3/8 in., 1/2 in., 3/4 in. and 1 in. PEX ASTM 1807 crimp rings only.
A: If you cannot obtain one "Go" reading on the Go-No/Go Gauge after making a crimp, you will need to recalibrate your tool, remove the crimped crimp ring, and redo.
A: yes,,,that is why I bought it.
A: Yes, this tool may be used with both brass and plastic PEX-B fittings.