Imperial to Metric Pipe

Mar 20, 2005 3 Replies
S

Hi, I am looking to connect in a new Bath,



My property was made in the early 60's so I suspect it is all imperial piping, therefore the pipes connecting the bath taps would be 3/4 inch.



I have to put new pipework in as I am moving the bath, are there couplings available that would connect 3/4" to 22mm pipe and is that the correct way to go about connecting them? If so could you point me in the right direction, I have looked on screwfix but I am unsure as to what would be suitable.



I have also got to do the same to the sink but I have read that 15mm to 1/2" pipe you can get away with a normal end-feed joint



Thanks for your help Chris


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A

imperial

Chris,

Two ways - you can get a 'Yorkshire' converter 3/4" -> 22mm and solder it, or you can get 3/4" converter olives that fit in normal

22mm compression fittings and take 3/4" pipe. Any good plumbers merchant should carry both (not one of the sheds).

1/2" is an ok but tight fit in 15mm. 28mm & 1" work ok together.

AWEM

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E

I have only had problems with compression fittings, which don't compress enough to make a complete seal and leak slightly until the pipe corrodes and seals the leak in a day or so. Push fit and solder fittings have given no trouble.

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D

15mm and 1/2" are as near as damn it have the same OD size, compression or solder will work fine. 22mm and 3/4" are not "close enough", 22mm is bigger. A 22mm compression can be murdered up to seal but it would be better to use a 3/4" olive. A normal 22mm solder joint might be made to work with a lot of solder and luck but again you can get 22mm 3/4" solder fittings, probably only couplers though. A proper plumbers merchant will have these 22mm 3/4" bits, the sheds might not.
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