Smeg AP91VJME - Manual (Page 6)

Instruction for the installer
8
2.3 Connecting to natural and LPG gas
(Please see connection diagram)
Make the connection to the appliance using flexible bayonet style hose in
accordance to B.S. 669. The hose connection at the rear of the appliance has a ½”
BSP internal thread. Please use seal C between the flexible connection L and the
appliance supply tube B. When making the connection, make sure that no stress of
any kind is applied to the cooker and that the hose does not touch any sharp
edges.
If connecting to LPG the bayonet hose must have red bands on it.