Post #2643729

2025-08-11 08:41 UTC

@edavies@functional.cafe @wyliecoyoteuk@mastodon.org.uk @StarkRG@myside-yourside.net @katemorley@hachyderm.io Plumbing in the UK is just water lego. But generally yes, anything 1/2" BSP is for 15mm pipe and 3/4" is for 22mm pipe. Occasionally you will come across real 1/2" pipe but it's rare these days.

Replies (3)

@jamesb@fedi.duckduckpigeon.co.uk 2025-08-11 08:43

@edavies@functional.cafe @wyliecoyoteuk@mastodon.org.uk @StarkRG@myside-yourside.net @katemorley@hachyderm.io And if you do, adapters are easy enough to find. For anything really odd I recommend bes.co.uk

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@edavies@functional.cafe 2025-08-11 08:46

@jamesb@fedi.duckduckpigeon.co.uk @wyliecoyoteuk@mastodon.org.uk @StarkRG@myside-yourside.net @katemorley@hachyderm.io It's waste pipes which really confuse me. None of the stated mm dimensions seem to correspond to either the actual inside or outside diameters.

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@wyliecoyoteuk@mastodon.org.uk 2025-08-11 08:53

@jamesb@fedi.duckduckpigeon.co.uk @edavies@functional.cafe @StarkRG@myside-yourside.net @katemorley@hachyderm.io 1/2" and 3/4" BSP fittings are still common and are used for taps, radiator valves and garden hoses amongst other things. They are not compatible with 15mm and 22mm.

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