I purchased a gas dryer that accepts a 3/8" NPT gas fitting at the back (typical of most gas dryers, I assume). My main gas line in the wall is 3/4". Total distance from meter to gas dryer is about 15-20 feet.
Given the ideal gas line configuration, what is the ideal fitting to reduce from 3/4" to 3/8"? Or should this be accomplished with more than one fitting (i.e., one fitting from 3/4" to 1/2" and another fitting from 1/2" to 3/8")?
Here is an insert from the Owner's Manual for the LG DLGX9001V:
If the dryer takes a 3/8" NPT fitting for the gas supply, and the home has a 3/4" gas supply pipe in the wall, with what fitting should I accomplish the reduction in diameter?
Best Answer
I would run 3/4 black pipe close to the dryer location (within 4 feet). Then assemble a Tee with fittings to make a sediment trap, a 3/4 to 1/2 inch reducer,
a cutoff valve, and then this appliance connector.
A step up in appliance connectors is this one
which automatically cuts the flow (to a tiny trickle) if there is grossly excess gas flow as when the hose is disconnected or the appliance fails in some dramatic way.
Some might omit the sediment trap.