3/4″ steel conduit pipe?

This topic has 9 replies, 6 voices, and was last updated 21 May 2026 at 17:57 by Andrew Tinsley.

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21 May 2026 at 09:33 #849041
Andrew Tinsley
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@andrewtinsley63637
I need to add a section to my existing conduit system. There appears to be plenty of suppliers for 20 mm conduit pipe but none that I could find that still stock the old 3/4″ pipe.

Bizzarely, there are no end of suppliers offering 3/4″ pipe with nipples or lengths with the conduit thread on each end! So it would seem that there is a plentiful supply of 3/4″ steel conduit tube!! Its just that I can’t find a supplier, can anyone suggest a source other than the scrapyard?

Andrew.
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21 May 2026 at 09:54 #849044
JasonB
Moderator
@jasonb
Can you just put an adaptor from where you need to extend from and then use 20mm?

https://www.edwardes.co.uk/products/lewden-pd1452a-3-4-male-x-20mm-female-conduit-adaptor-galv-steel?gad_source=1&gad_campaignid=18306676680&gbraid=0AAAAADsbJ5862Oqie7-r4uInNso4-qu6o&gclid=CjwKCAjw2rrQBhBuEiwAarLWHf2LsZtIvDUC9MClbbFHzvJmS98vlWdgXTGTQ0TX4pgF2jzLrsxFSRoCjOQQAvD_BwE
21 May 2026 at 10:00 #849046
Nicholas Farr
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@nicholasfarr14254
Hi Andrew, JasonB beat me to it, but there are plenty of adapters available. Conduit adapters

Regards Nick.
21 May 2026 at 15:28 #849079
Andrew Tinsley
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@andrewtinsley63637
I shall probably have to use 20mm pipe. I still cannot understand why there are hundreds of suppliers who can provide 3/4″ pipe with threaded ends and no retailer that can supply the 3/4″ pipe. The 3/4″ pipe is obviously available to the hundreds of suppliers who supply the pipe tapped at both ends!!!!

Andrew.

P.S. I always prefer imperial material rather than Metric if I have the choice.
21 May 2026 at 15:47 #849082
Grindstone Cowboy
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@grindstonecowboy
Couldn’t you cut the threaded ends off?

Rob
21 May 2026 at 15:54 #849087
duncan webster 1
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@duncanwebster1
On 21 May 2026 at 15:28 Andrew Tinsley Said:

…..P.S. I always prefer imperial material rather than Metric if I have the choice.

Well call it 25/32″ pipe. Seriously the stuff with threads on might actually be 20mm but with 3/4 thread cut on
21 May 2026 at 15:56 #849091
JasonB
Moderator
@jasonb
The ones you are seeing are either supplying other markets eg the US or put 3/4 and 20mm in the same description when only selling 20mm.

Or google is throwing up thicker wall 3/4″ BSP threaded pipe and not conduit.
21 May 2026 at 16:05 #849092
DC31k
Participant
@dc31k
On 21 May 2026 at 09:33 Andrew Tinsley Said:

Bizzarely, there are no end of suppliers offering 3/4″ pipe

Would it be possible to provide links to one or two of those?

You could look up when BS 31 was withdrawn (31 August 2015). That may give you some indication of why finding a supplier is difficult.
21 May 2026 at 16:50 #849105
JasonB
Moderator
@jasonb
M-machine have both ERW and Solid Drawn tube in 3/4″ OD and various wall thicknesses.

https://www.m-machine-metals.co.uk/downloads/Metals%20catalogue.pdf Right at the end.
21 May 2026 at 17:57 #849116
Andrew Tinsley
Participant
@andrewtinsley63637
Thanks everyone for your suggestions. I decided to take my own advice and visited my local scrapyard. I came away with around 5 metres of genuine 3/4″ conduit tube for a couple of pounds. So all sorted and I have enough material to last me out.

Andrew.
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