gas connection

WorldCitizen

Hello,
I have a question about new gas connection for gas hob - particularly WHERE should be connection and what kind of pipe (copper or plastic flexible)?
Our situation:
We have an electrical hob which we decided to change to the 4 burners gas hob.
We have gas meter at one side of the kitchen, and the boiler (28kw) at the other side of the kitchen. The copper pipe (probably 22 mm?) from gas meter goes under floor to the boiler. The hob is 1 m from the boiler (so is at the other side of kitchen from the gas meter).
When I had annual boiler check up I have asked where would be the connection for the new gas hob and engineer answered that it would be just under the boiler (and showed with his hand at the place on the pipe approx. 15 cm under boiler).
Of course I will do queries, but what I am concerned about is the place of pipe connection...
I don't remember where did I read that new connection should come from the meter and NOT from the existing pipe which is used for another appliance.
Can you shed some light for me please, knowing people?!

EssexExile

My gas pipe goes from the meter to the boiler then on to the kitchen & then the rest of the house. The only problem would be if the pipe isn't big enough to supply the boiler and hob.

Mr.Generous

22 pipe is big enough, the gas meter is a regulator and will maintain pressure. The hob should be rigidly plumbed with 15mm copper, gas fitter will 'T' off the 22. It must have an isolation gas !!!! fitted, every gas appliance has to be capable of being separately isolated.

It doesn't like a word that also means rooster …


Compression Fan Key Gas Cokc 15mm

WorldCitizen

Thanks for your answers.
Can I make sure if I understand correctly - the pipe to the hob has to be copper only?

Mr.Generous

Gas installation regulations for gas hobs:
– Always hire a Gas Safe registered engineer to complete any gas installation.
– Never attempt to install or fix a gas appliance yourself.
– Gas hobs must only be connected using rigid copper piping, not a flexible gas hose.
– When installing a hob a minimum of 750mm clearance is required above a gas hob to a cooker hood.
– Any wall units that are either side of the hood must be at least 366mm above
– A minimum of 300mm clearance is required either side of the hob if installing next to flammable material.

WorldCitizen

Thank you very much, Mr. Generous!
I will use registered engineer.
Just I have had bad experience with plumbers, that's why I am asking questions here before I see anyone who will do the gas job.

WorldCitizen

One more question:
can electricity wire be put under floor if there are heating pipes with water?
Can they touch each other or is that dangerous? will it be enough to 'seal' wire into split flexible cable tube?

Mr.Generous

Yes they can run close, the same cut out is ok, the heat is the issue. You need to protect the wiring from the heating pipes. Plastic trunking alone won't do it, insulate the pipes.

bris

Keep electrical wiring at least 25mm away from gas pipes.


Hob is rigid cooper but not only any more, there is a new kid on the block https://www.toolstation.com/shop/p89705?r=googleshopping&rr=marin&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&mkwid=sDx6cFNWD_dc&pcrid=142003768299&pkw=&pmt=&product=89705&gclid=EAIaIQobChMIgZjoiMbt3QIV77ztCh296gCDEAQYASABEgK0J_D_BwE

southcoastrgi

Mr.Generous wrote: »

1. Gas hobs must only be connected using rigid copper piping, not a flexible gas hose.
2.When installing a hob a minimum of 750mm clearance is required above a gas hob to a cooker hood.

1. Not necessarily correct, it only has to be rigid if the installation manual tells you it has to be, most don't & therefore you can use a hose providing it's not subjected to a temp above 70d.

2. Not correct, BS is 760mm but again the MI should be ref to & most will allow the hood lower.

It also doesn't HAS to have a shut off valve as it's a service valve & not a isolation valve.

southcoastrgi

Gas pipe size should be worked out you can't assume the existing pipe is capable of supplying the boiler & the hob