i reccomend using copper tubing between the cockpit locker and the galley
the tube should be well supported,and not come in contact with other metal.
either end should be terminated using olives.
at the stove side a gas shut off valve should be fitted and a shielded flexible hose to the stove.
the cockpit locker should be vented below to an outboard
the gas regulator
should be connected with the correct gas hose(date of manufacture stamped on hose),and terminated to nipple/olive connection to the copper tubing,preferably on a fixed mounting.
in line between the copper tubing and regulator a gas solenoid can be fitted,with an on/ off switch at the galley,but this is optional.
this is the system that is generally used this side of the pond,that i have installed in the past.
a gas detector and alarm
are also mandatory on commercial
type stoves should also be fitted with thermo couples.