I need to get a gas jet off the hob to have a clean out of the nozzle
and any debris in the supply pipework.

Have been told to disconnect the mains electric as its difficult to blow
any debris out the pipework with the gas blowing, without setting of the
electric spark ignition.

They say setting of the spark whilst blowing gas out is dangerous.
In this particular situation its very difficult to turn off the electric
supply. (Its connected behind a nearby microwave, that i really don't
want to take out of its position; to get at this connection).

Is it really that dangerous, even if it ignites gas coming out of he
pipework?

Since I'll be there all the time watching over it. Any suggestions
please?

Yes it is, It could be an explosive mix.
Turn the house of for an hour while you do the cleaning, Simples.
Brian

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"john west" wrote in message
...
I need to get a gas jet off the hob to have a clean out of the nozzle and
any debris in the supply pipework.

Have been told to disconnect the mains electric as its difficult to blow
any debris out the pipework with the gas blowing, without setting of the
electric spark ignition.

They say setting of the spark whilst blowing gas out is dangerous.
In this particular situation its very difficult to turn off the electric
supply. (Its connected behind a nearby microwave, that i really don't
want to take out of its position; to get at this connection).

Is it really that dangerous, even if it ignites gas coming out of he
pipework?

Since I'll be there all the time watching over it. Any suggestions
please?

On Thu, 7 Mar 2019 14:30:51 +0000, john west
wrote:

I need to get a gas jet off the hob to have a clean out of the nozzle
and any debris in the supply pipework.

Have been told to disconnect the mains electric as its difficult to blow
any debris out the pipework with the gas blowing, without setting of the
electric spark ignition.

They say setting of the spark whilst blowing gas out is dangerous.
In this particular situation its very difficult to turn off the electric
supply. (Its connected behind a nearby microwave, that i really don't
want to take out of its position; to get at this connection).

Is it really that dangerous, even if it ignites gas coming out of he
pipework?

Since I'll be there all the time watching over it. Any suggestions
please?

From your last sentence I assume the work will be done by a qualified
gas engineer. He or she will know what to do even if you don't and
will be legally responsible for the consequences. I suggest you leave
it to the experts. I am sure your engineer would prefer you to find
something else to do rather than 'watch'.

On 07/03/2019 14:30, john west wrote:
I need to get a gas jet off the hob to have a clean out of the nozzle
and any debris in the supply pipework.

Have been told to disconnect the mains electric as its difficult to blow
any debris out the pipework with the gas blowing, without setting of the
electric spark ignition.

They say setting of the spark whilst blowing gas out is dangerous.
In this particular situation its very difficult to turn off the electric
supply.Â*Â*Â* (Its connected behind a nearby microwave, that i really don't
want to take out of its position; to get at this connection).

Why not pull the fuse/circuit breaker for the kitchen circuit?

Is it really that dangerous, even if it ignites gas coming out of he
pipework?

Depends what you mean by dangerous. It probably won't do much more than
singe all the hairs off your arms, face and fringe when it flashes over.
Failure to put it back together again correctly could be more serious.

We had it happen to a guy servicing our gas hob in Japan once. Exactly
the same mode of failure, didn't isolate and then it sparked - WHOOF!
A surprisingly large fireball - smell of burning hair is not appealing.

Since I'll be there all the time watching over it.Â*Â* Any suggestions
please?

Be sure there is someone else with you. Preferably a qualified gas
fitter otherwise you are headed for a Darwin award.

If you do get knocked unconscious by the blast and the gas remains unlit
afterwards you could end up with a very big bang or asphyxiated.

--
Regards,
Martin Brown

On Thursday, 7 March 2019 14:30:54 UTC, john west wrote:

I need to get a gas jet off the hob to have a clean out of the nozzle
and any debris in the supply pipework.

Have been told to disconnect the mains electric as its difficult to blow
any debris out the pipework with the gas blowing, without setting of the
electric spark ignition.

They say setting of the spark whilst blowing gas out is dangerous.
In this particular situation its very difficult to turn off the electric
supply. (Its connected behind a nearby microwave, that i really don't
want to take out of its position; to get at this connection).

Is it really that dangerous, even if it ignites gas coming out of he
pipework?

Since I'll be there all the time watching over it. Any suggestions
please?

One of the fusebox fuses supplies it.
I'm not sure if you're allowed to remove a nozle, hopefully you already know.

On 07/03/2019 14:30, john west wrote:
I need to get a gas jet off the hob to have a clean out of the nozzle
and any debris in the supply pipework.

Have been told to disconnect the mains electric as its difficult to blow
any debris out the pipework with the gas blowing, without setting of the
electric spark ignition.

They say setting of the spark whilst blowing gas out is dangerous.
In this particular situation its very difficult to turn off the electric
supply.Â*Â*Â* (Its connected behind a nearby microwave, that i really don't
want to take out of its position; to get at this connection).

Is it really that dangerous, even if it ignites gas coming out of he
pipework?

Since I'll be there all the time watching over it.Â*Â* Any suggestions
please?

I'd be more worried about getting a shock, but burns are a possibility.
Just throw the local breaker / pull the fuse at the consumer unit.