plumbing


Postby benannajack » Mon May 17, 2010 7:09 pm

i am fitting a kitchen and cannot avoid ruuning the waste pipe from the sink behind the cooker
the outlet means i cannot drop the pipe to the floor it needs to run about 15 inches off the floor
therefore it will get hot and possibly melt with the heat from the cooker does anybody know of a heat deflector the i could use to protect the pipe
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Postby plumbbob » Tue May 18, 2010 7:09 pm

It is unlikely the back of the cooker will get hot enough to damage the pipe. The back will be no hotter than the sides which will be against the wood of the units.

You may have a problem with the pipe stopping the cooker from being pushed back against the wall. If it is a built in oven, it won't fit at all.

Generally, if pipework needs to pass by appliances the only way is to chase it into the wall, but of course this is not always possible.
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Postby benannajack » Thu May 20, 2010 6:25 pm

plumbbob wrote:It is unlikely the back of the cooker will get hot enough to damage the pipe. The back will be no hotter than the sides which will be against the wood of the units.

You may have a problem with the pipe stopping the cooker from being pushed back against the wall. If it is a built in oven, it won't fit at all.

Generally, if pipework needs to pass by appliances the only way is to chase it into the wall, but of course this is not always possible.


thanx for your reply its a free standing cooker so can sit out a little, and as for the walls its a block of flats with concrete walls ( nightmare to chase out and also i would imagine not to good for the structure of the building)
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Postby plumbbob » Fri May 21, 2010 8:02 am

Many freestadnong ovens especially gas have a vent at the back to allow gasses to escape and this vent does become hot. Inspect the oven before you install the pipework to see exactly what is where.

Make extra effort to keep the waste pipe as low down as possible where there is likely to be a greater void and less heat.
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Postby htg engineer » Fri May 21, 2010 2:25 pm

'It is unlikely the back of the cooker will get hot enough to damage the pipe. The back will be no hotter than the sides which will be against the wood of the unit'

Not true - it is in fact very likely, this is why you cannot use flexible gas connections on built in ovens - as it can melt the rubber flexible cooker hose.

You need to re-route pipe or move cooker position - i wouldn't have a pipe behind the cooker - unless copper

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Postby plumbbob » Fri May 21, 2010 5:06 pm

htg engineer wrote:Not true - it is in fact very likely, this is why you cannot use flexible gas connections on built in ovens - as it can melt the rubber flexible cooker hose.

htg


I beg to differ Htg, :-) but built in ovens always use flexible gas pipes. You couldn't physically install them otherwise. Another point, power supplies to the oven do not have to be heat resistant either as standard T&E cable is used.

Maybe you are thinking of a built in hob which should have a copper connection. (Mind you I have seen these in flexible more than once.)

With freestanding appliances the oven vent is up the back exiting at a grill plate behind the hob rings. This can get quite hot. With built in appliances as they have limited ventilation the oven vent is above the door at the front which to be honest I don't like.
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Postby htg engineer » Sat May 22, 2010 3:16 pm

Yeah sorry I meant gas hob - but it's not the heat from the hob that'll effect the flexible hose is it ? so there is alot of heat behind ovens.

I think you'll find you should use heat resistant cable for cooker/oven connections, especially if it's in contact with the cooker/oven.


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