Instead of the 3/4" NP to 1" slip adapter, has anyone used a 32mm to 1" slip adapter instead? What size thread BSP thread would you need for part 42222--is it 32mm or 25mm?
https://www.coralvue.com/metric-male-coupling
Those will not work, they are actually the reverse. The metric side is the slip side. Broadfield investigated this and posted it long ago earlier in his thread.