I'm replacing my gas cooker for an electric one.
The gas cooker has a brass pipe exiting the wall and
then onto that is a flexible rubber hose that connects
to the cooker.
How do I remove this safely and close the pipe?
Before doing anything else, turn on one burner of the cooker and go to the
mains valve at the meter and turn it off. It should be in the same line as
the pipe when it's on and lie at a right angle to the pipe when it's off.
After you've done this, the gas left in the pipe is burned off at the burner
on the cooker and very little is left in the pipes. It's called "Flaring
Off" and helps to the smell to a minimum.
The existing fitting on the supply pipe is a bayonet connector and the hose
is disconnected by pushing it in toward the fitting and giving it a quarter
turn anti-clockwise. Like taking a bulb out. The bayonet fitting is self
sealing but, if it hasn't been used for a while, it may be a bit sticky, so
you shouldn't rely on it being totally sealed.
Go back to the mains valve and turn it on, then listen at the fitting for
any hissing sounds, or after five minutes or so, any smells that be become
The pipe itself should have the bayonet connector removed and have a
soldered end cap fitted to make it completely safe, and if it isn't going to
be used again while you live in the house, but I think you'd need someone
else to do that for you.
Good Luck with it.
Apart from various unorthodox techniques for gas fitting all the above
assumes that this cooker is connected with a standard modern bayonet
Many older installations are fitted directly into the supply pipe work.
If the fitting on the end of the hose has a knurled brass disc about 5mm
thick and about 40mm diameter then it is a bayonet connector and undoes
like a light bulb with attitude.
As the above suggests there is a small chance the bayonet connector
might fail if there has been many years since it was last used - so when
you disconnect you may have to turn off the gas at the meter and call
for help. There's a good chance that you might get Transco to seal it
(if it's leaking) for free but they might also Turn Off Label & F**k
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
You getting an electric hob as well? Wouldn't be my choice. I'm thinking
about replacing the existing gas free standing cooker with either a better
(newer) gas cooker, or gas hob / electric single oven cooker (though that
would mean chopping up some worktops as for some reason all electric cookers
are 60cm wide and gas ones are generally 55cm wide).
As far as the connector goes, I thought the bayonet type was meant to be
largely idiot proof and for consumers to be able to disconnect ovens
themselves. If a gas engineer has to remove the applicance now, when the new
electrical regs come in, will I need an electrician to plug something into a
wall socket for me?
Cooker bayonet connectors are a known source of leakage,often low
level. They sometimes just dont seal off tightly. Often the leakage
cannot be detected on a water gauge and an electronic gas detector has
to be used to confirm it.
It is not very good practice to leave a self sealing unit in situ' if it not
going to be used for a long period of time and much safer to cut and cap the
pipe properly with a soldered fitting. The fibre seal rings will perish
over time and that is why we are the OP to check for any leakage, even
minute, if he is leaving the bayonet connector open until the pipe is
correctly sealed. It's just not worth taking any chances.
The rubber hose that connects to the back off the cooker will "pop-out" just
like a light bulb. Simply push it in and turn. once this pipe has been
dis-connect the gas supply is usually shut-off automatically by the above
procedure. however for long-term disconnection it would be advisable to get a
competent person to carry out the "capping off"
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