LPG to PNG conversion: what changes in your kitchen

Moving from a cylinder to the pipe is mostly an improvement — no bookings, no running out mid-meal. But LPG and PNG are not the same gas, and an appliance set up for one does not simply run on the other.

The gases differ

LPG is delivered at a higher pressure and burns with a different air mix than PNG. A burner jet sized for LPG passes too much PNG, giving a large yellow lazy flame that soots pans and wastes gas.

What conversion means

• Each burner's jet is swapped for a PNG-sized one
• The air shutter or mixing tube is adjusted for the new mix
• Every burner is lit and the flame set to a tight blue ring
• The cylinder regulator is removed — PNG comes regulated from the meter

What stays

The stove or hob body, the burners, the ignition, the knobs. Conversion is a jet-and-adjust job, not a new appliance. Most stoves sold in India in recent years are convertible; the manual will say, or the model will have a PNG jet kit available.

What must go

The old rubber LPG pipe and regulator. PNG appliances connect to the wall valve with a connector rated for the purpose. Reusing the LPG hose is a common shortcut and a wrong one.

If a converted stove shows a yellow, lifting or noisy flame afterwards, it is not converted properly. Do not use it until the installer has re-set the jets. A misconverted burner produces carbon monoxide.

Who does it

The installer who runs the internal line will usually convert the appliance in the same visit. If you buy a new hob later, ask for it in PNG spec from the shop, or have it converted before it is connected.