"Rob" wrote in message
news:OCzFd.99507$KO5.55504@clgrps13...
Looking at a basement rental NG furnace, I noticed that the black steel gas
pipe was joined to the gas valve with a 6" length of 1/2 copper pipe. Is
this legal? Safe? Should not only the black steel, approved for gas pipe be
used?

This is Turtle.

You need to go back to alt.hvac and see a complete run down on this question
that you posted earlier.

TURTLE