Originally Posted by
Mwenenzi
For 1/2" nominal both BSP & NPT are both 14 tpi. However the thread form/angle is different
May also be a problem due to parallel - taper threads.
The manufacturing standards/quality of some domestic fittings is very poor. As can items for industrial markets
So far I think I've identified 5 standards: BSP, NPT, GHT, ISO, and JIS... plus variations based on taper and thread pitch. None of them seem to fit the faucet. I've got calipers and a pitch gauge coming from Big River tomorrow so maybe that will provide a clue.