aka senior moment.
i recently saw on the AC berlin website this:
and i thought: "Great! now i can screw a 90 degree connector directly into the aquastream inlet!"
this was instead of using a 90 degree double push-fit connector with the standard connector on the aquastream.
so, off goes the email to AC Berlin to find out what size inner thread it had, because i already had a 1/4" gewinkelt swivel connector, and thought it'd be great if that would go straight in.
then i looked at the aquastream installed in my case.....
they already had these adaptors installed.
lucky me i didn't order them.
i bet you're wondering why you just wasted your time reading this aren't you?
sorry.