G3/4" Water Flow Sensor Witch,Copper Hall Effect Flowmeter Liquid Fluid Meter Sensor Switch Flowmeter Meter 2-45L/min

G3/4 = BSP 3/4 = DN18This is a GLOBAL standard for threads and it is different from the "National Pipe Thread(NTP)" which is used almost exclusively in North AmericaFor customers in the USA, you'll need a pair of NTP to BSP adapters, or PEX to BSP if using PEX pipe.

These threads appear to be Acme style and will not engage with the threads of an NPT fitting - PERIOD. It's not even like in a pinch you could apply 7 layers of PTFE sealing tape and jam them together using only three turns - they're not even remotely similar to NPT, although the OD does in fact appear to be 3/4".Should have chosen the Digiten version of this...