thank you for the lead. this seems to be a 14mm hex to 3/4 . as i understand it, the plug is 14mm, and the other end is 3/4. but, why 3/4? could it be 1/2?
i ask because i dont have 3/4 wrench.
something like this:
https://www.homedepot.com/p/GEARWREN...0662/204617131
but why looks so different ?