Gas cooker gas isolating valve ?

[dugit]

I am thinking of getting a duel fuel cooker (freestanding) in place of my present natural gas cooker.
When I pulled the cooker out to look for electrical and gas connections (it has double pole control unit 32A with switch to the side and above the hub of the cooker) but the flexible gas connector does not have a gas isolating valve to the cooker, should it have one ? ( The gas input to the whole house can be switched off in the garage).

[plumbbob]

Yes.

The flexible hose should be either a bayonet or microline type which automatically shuts the gas off when disconnected.

[dugit]

So it is OK to disconnect a flexible connector from cooker as no gas would then escape, but if a new gas connector was required for a new cooker then it is normal to switch off the gas at the mains for the replacement ?

[dugit]

So if I disconnect flexible hose at cooker then it is OK, but if I replace with new flexible hose and new cooker then it is normal to have to switch gas off for the whole of the house ?

[plumbbob]

...........but if I replace with new flexible hose and new cooker then it is normal to have to switch gas off for the whole of the house ?

No. The flexible hose is permanently attached to the cooker and unplugs (well should do) at the wall end so it and the cooker can be replaced without shutting off the gas to the whole house.

Please can I remind you though that replacing this hose or the cooker itself must be done by a Gas Safe registered engineer who will ensure there isn't a leak and test the burners for correct operation.

[dugit]

But can 't I remove the flexible hose from the cooker so that it can be taken away at the same time as I have a new cooker delivered ?