This 3/8" NPT to 1/4" NPT compression fitting adapts a 3/8" propane supply line to 1/4" or vice versa. 3/8" is the standard size on the outlet of most LPG regulators sold in North America (See Photo)

Propex 1/4"NPT to 1/4" NPT Compression Elbow fitting.  Use this to make a 90-degree turn in your 1/4" gas supply line. You can also use this on HS2211 models sold after May 2021 to make a...