Lemfema Grill Gas Conversion Kit for Natural Gas to Propane, 3/8" Flare Adapter, Dual-Mode Regulator

Lemfema's conversion kit and pressure regulator lets you safely switch between natural gas and propane for compatible grills while stabilizing gas pressure for consistent burner performance.

This compact kit includes a dual-function regulator, a propane hose, multiple orifice jets, and inlet/outlet adapters to fit many 3/8" male-flare NG appliances and LP setups. It’s engineered to lower high-line pressure and supply the correct working pressure for outdoor cooktops and grills, helping reduce sputter and uneven flames when installed correctly. Before ordering, confirm your grill’s thread type and model compatibility to avoid fit issues.

How does this regulator convert between natural gas and propane?

The Lemfema regulator supports two regulation modes and can be set to the appropriate inlet/outlet pressures for LPG or natural gas. Swapping the 10" W.C. and 4" W.C. settings with the included adapters and selecting the correct orifice nozzle changes flow characteristics to match fuel type and burner requirements.

• Includes a 10" W.C. LP regulator and a 4" W.C. natural gas valve for interchange.
• Two regulation modes: LPG mode ~11"/10" W.C. and NG mode ~7"/4" W.C.
• Flow rates: LPG ~30 L/min; NG ~50 L/min (typical when properly installed).
• Adapters let you connect to 3/8" male-flare fittings and common outdoor appliances.

Which grills and fittings are compatible with this conversion kit?

The kit is designed for appliances using 3/8" NG hoses and 3/8" male flare fittings, covering many aftermarket grills and cooktops. It is not compatible with certain Weber pre-2005 Genesis models, specific Genesis II variants listed by the manufacturer, or appliances using different thread standards like 1/4-32unef.

• Compatible: most outdoor grills with 3/8" male flare NG fittings.
• Not compatible: older Weber Genesis models and some Genesis II variants.
• Check thread type—this kit uses M6x0.75 mm jets and 3/4" 1-6 UNF inlet adapter.
• Measure your appliance inlet or consult manufacturer specs before purchasing.

What components are included, and how do the orifice sizes affect performance?

The package contains a regulator assembly, a 5.9" propane hose, multiple jet nozzles in varied diameters, and inlet/outlet fittings to adapt to your grill. Different orifice diameters alter the gas volume delivered to burners—larger orifices give more flow and a larger flame, while smaller orifices reduce flow for safer, controlled combustion on lower-pressure systems.

• Included orifices: 2.0mm (5 pcs), 1.39mm (2 pcs), 0.5mm (5 pcs).
• Use larger orifice for higher flame needs; smaller for reduced flame and steady burn.
• Thread spec: M6x0.75 mm jets—confirm thread type before use.
• Hose length: 5.9" propane hose for short-run connections or retrofits.

How do I install and maintain this conversion regulator safely?

Installation requires matching the regulator adapters to your appliance threads, selecting the correct orifice, and testing the system for leaks with soapy water—do not use open flames for testing. Routine checks for hose wear, cracked seals, and secure fittings will keep performance safe and reliable over time.

• Hand-tighten then test fittings with a leak-detection solution; re-tighten as needed.
• Replace any damaged or mismatched threads—do not force incompatible fittings.
• Inspect hoses and seals before each grilling season or after long storage.
• Refer to local codes and consider a qualified technician for permanent conversions.

Who is this for: The Lemfema Natural Gas/Propane conversion kit is aimed at experienced DIYers, backyard grillers, and appliance hobbyists who need a compact, adjustable regulator to switch fuels or stabilize pressure on compatible outdoor cooking equipment. It’s best for users who can verify thread types, are comfortable selecting the correct orifice for their burners, and can perform basic pressure and leak tests. If you’re unsure about compatibility or installation, consult a qualified technician or your grill manufacturer for guidance.