Hob cut out / pipe install help

[gk141054]

Hi guys,

Just planning a cut-out for my new gas hob in the kitchen...

The instructions state that the minimum distance from the back wall should be "A"

and it later says:

A = 60mm (combustible) or 25mm (non-combustible)

I am going to be tiling the back walls with ceramic tile so probably a stupid question but I assume these are "non-combustible" and so I can start it at a minimum of 25mm from these tiles?

EDIT:

Follow up question - as long as the above rule is followed, is there any reason why I shouldn't make the hob equidistant from the back and front, rather than set it slightly back or forward?

 

[sooey]

Yes, the tiles are non combustible and yes of course you can make it equidistant front to back if that allows you the minimum clearance.

 

[gk141054]

Thanks for the reply mate.

Further to the last question... i'm still imagining problems:

The current connection to the freestanding cooker is shown below.

View media item 23191
Obviously when my gas fitter comes to install the new hob he will have to fit solid pipes as the current flexible pipe that I have is not allowed on a built in hob.

My concern is that my oven needs a depth of 555mm and the depth of the cabinet it is going into is 570mm. That only leaves 15mm for that gas pipework behind the oven.... I think even the current connection sticks out more than 15mm and thats straight out.... the new pipework will need to then got up 90 degrees to the hob.

If this was a problem then it would occur very often so can I assume that the new pipework will be recessed into the wall up above the line of the oven so that there won't be any clearance issues?