Miele Touchtronic T 9820 Operating And Installation Instructions page 46

Gas connection
^ Connect the flare union adapter, a,
to the pressure tapping plug, b,
originally installed on the gas shut off
valve, c.
^ Using two adjustable wrenches
tighten all connections.
Do not over tighten.
42
^ Open the gas shut-off valve.
^ After connecting the appliance check
all fittings for gas leaks e.g. with
soapy water or an equivalent.
,
WARNING
NEVER USE AN OPEN FLAME TO
TEST FOR GAS LEAKS.