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Old 23 September 2007, 22:32   #1
DanTheMan
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Question Gas Hob installation ?

Guys,
got a new hob but don't want to use a bayonet hose as this would be too big to fit behind the cooker. Manufacturers instructions say you can use a "flexible steel pipe" but I have not seen any of these around so I may have to get a gas engineer in to put in a 30cm long fixed pipe. How much do you reckon this would cost in Surrey ?

Nice picture of the job in hand incase someone on here is Corgi registered and fancies an hours work.....

Click the image to open in full size.
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Old 24 September 2007, 15:27   #2
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Apparently it's illegal to use a flexible hose behind a cooker anyway........

Alcazar
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Old 24 September 2007, 17:35   #3
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I don't know where you got that from, fixed cooker hobs may be installed using a flexible hose, providing this is approved by the appliance manufacturer, or so say Corgi.

Does not help me in this case unless I bend the pipe with the bayonet hose socket back into the wall, not the prefered way.....
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Old 24 September 2007, 19:30   #4
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Quote:
Originally Posted by alcazar View Post
Apparently it's illegal to use a flexible hose behind a cooker anyway........

Alcazar
All free standing gas cookers/ranges have flexible pipes behind them?

My corgi engineer insists that hobs are hard piped, flexible connection to hobs does not comply with corgi regulations.

I have asked why it is ok to connect a moveable free standing cooker with a flexible, but not acceptable to connect a fixed hob, as surely there is more risk with the moveable item. But he cannot give me a valid technical reason, just states the corgi requirement for hobs to be hard piped.
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Old 24 September 2007, 20:00   #5
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For a gas hob you have to have an emergency shut off valve, so i would channel out the gas pipe so you can cut the pipe, attach a 15mm endfeed isolator, then use 10mm copper pipe to feed the hob.
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Old 25 September 2007, 15:00   #6
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Quote:
Originally Posted by yellowvanman View Post
All free standing gas cookers/ranges have flexible pipes behind them?

My corgi engineer insists that hobs are hard piped, flexible connection to hobs does not comply with corgi regulations.

I have asked why it is ok to connect a moveable free standing cooker with a flexible, but not acceptable to connect a fixed hob, as surely there is more risk with the moveable item. But he cannot give me a valid technical reason, just states the corgi requirement for hobs to be hard piped.
I believe its so that if you move the free standing cooker the flexi pipe does just that, flexes, rather than the isk of a fracture or broken joint

Not to mention the fact that connecting rigid pipework behind a free standing cooker could be a nightmare.

Makes sense if you think about it
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Old 25 September 2007, 15:13   #7
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Originally Posted by Devildog View Post
I believe its so that if you move the free standing cooker the flexi pipe does just that, flexes, rather than the isk of a fracture or broken joint

Not to mention the fact that connecting rigid pipework behind a free standing cooker could be a nightmare.

Makes sense if you think about it
Read my post again

It is as you say pretty obvious why a movable appliance is flexibly connected.
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Old 25 September 2007, 16:13   #8
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Quote:
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Read my post again

It is as you say pretty obvious why a movable appliance is flexibly connected.
Sorry mate, we all make mistakes

No need for the "rolleyes"
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Old 25 September 2007, 19:37   #9
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Sorry mate, we all make mistakes

No need for the "rolleyes"
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Old 26 September 2007, 20:01   #10
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Gas hob MUST be connected using metal/copper rigid pipework. It is illegal to install with a flexible rubber hose/bayonet.

You gas connection needs to be altered, the bayonet fitting needs removin, and inline gas valve must be fitted and then copper/metal pipe to the hob.


Bob
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Old 26 September 2007, 20:23   #11
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Bob I aggree your method is exactly what I want to have done in this case, I'm waiting for 5 local gas engineers to return my calls & emails.

But your statement about it being illegal to use a flexible hose is contradictory to the Corgi rules, they say it's ok if the manufacturers installation instructions allow it.
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Old 26 September 2007, 21:45   #12
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Ok, I'll rephrase it to be more accurate . . . .

It is illegal to connect a gas hob with a rubber flexible hose when the hob is installed ABOVE an oven or other appliance giving rise to temps in excess of 70 deg C.

If the hob was to be above a kitchen cupboard, for example, then that is different.

Whatever the case, it must have an inline isolation device.

Not a qualified plumber myself, but I do a lot of house refurbs and employ a corgi guy (friend) and have learnt my stuff from him.

Bob
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Old 12 October 2007, 22:13   #13
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Sorted it, only 50 for a Corgi gas man to install the fixed pipe, was pleasantly surprised !
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Old 12 October 2007, 22:13
 
 
 
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15mm, conect, connect, connecting, connections, cooker, feed, flexi, gas, hob, hobs, install, installation, pipe, valve


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