Quote:
Originally Posted by T-Cut
Are metric threads used on plumbing parts? I always thought they were BSP, but maybe it's changed?
TC
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They certainly are on trv heads
Quote:
Originally Posted by Avulon
29.6mm (How/with what are you measuring it?) is closer to 30mm than either 3/4" BSP or 1"BSP
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With a cheapy Chinese digital caliper
Quote:
Originally Posted by RoverP480
Just looked up Metric thread tolerancing and depending on the grade the minimum O/D could be 29,522mm, max O/D 29.947mm, so 29.6mm could well be a nominal 30mm
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Good enough for me!
Quote:
Originally Posted by Heddy
If you're changing the TRV's and wondering what size thread they are then as far as I know they're std, so you can't go wrong.
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As far as I can tell there are at least 3 different sizes depending on age and manufacturer!