Gas Dryer stub out size in black pipe?
From manual downloaded from LG.com site for one of their gas models (note: NOT intended as advice!!!!!):
"Supply line requirements:
Your laundry room must have a rigid gas
supply line to your dryer. In the United States,
an individual manual shutoff valve MUST be
installed within at least 6 ft. (1.8 m) of the dryer,
in accordance with the National Fuel Gas Code
ANSI Z223.1 or Canadian gas installation code
CSA B149.1. A 1⁄8 - inch NPT pipe plug must
be installed. Failure to do so can result in fire,
explosion, or death
• If using a rigid pipe, the rigid pipe should be
½ - inch IPS. If acceptable under local codes
and ordinances and when acceptable to your
gas supplier, 3⁄8 - inch approved tubing may be
used where lengths are less than 20 ft.
(6.1 m). Larger tubing should be used for
lengths in excess of 20 ft. (6.1 m). Failure to do
so can result in fire, explosion, or death."
So, using the incorrect size (too big, too small) line could be disastrous! Best to spend the coin, get a plumber, and have it done properly.