Smeg PV331CN Manual page 19

Connection with hose connector
Carefully screw the hose connector 3 to the
appliance's gas connector 1 (½" thread
ISO 228-1), placing the seal 2 between
them. The hose connector reduction 4 can
also be screwed to the hose connector 3,
depending on the diameter of the gas hose
used. After tightening the hose connector(s),
push the gas hose 6 onto the hose
connector and secure it with the clamp 5,
which must be compliant with applicable
regulations.
Connection using a rubber hose
complying with current standards is
only permitted if the hose can be
inspected along its entire length.
The inside diameter of the hose
must be 8 mm for LPG and 13 mm
for Natural gas and Town gas.
The gasket is necessary to avoid gas leaks.
At the end of the installation, check for any
leaks with a soapy solution, never with a
flame.
Installation
Connection with a steel hose
Make the connection to the gas mains
using a continuous wall steel hose whose
specifications comply with the applicable
standard.
Carefully screw the connector 3 to the gas
connector 1 of the appliance, placing the
seal 2 between them.
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