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Rigid connection:
Carry out connection by using metal rigid pipes (copper with mechanical end).
"Flexible" connection with mechanical end:
Natural gas: connection carry out with a flexible pipe with mechanical end which is screwed directly on the elbow finishing the slope of the appliance.
Butane/Propane: use a flexible tube, equipped with it's collars **if it is worth visiting over all it's length** and if the appliance runs only on butane.
If the appliance runs on Propane, use a flexible pipe with suitable metal end.
Flexible nonmetal pipes connection:
If it is possible to easily control the connection in its full area, you can use a flexible pipe.
Tightly attach the flexible pipe by clamps.
With a socket spanner 7 remove the injectors and replace them with the ones which are necessary for the type of gas you use (see table in "Technical Data" chapter).
Replace the rating plate (it is near the gas supply pipe) with the one for the new type of gas supply.
You can find this plate in the package supplied with the appliance.