Don Bohm wrote:
AC-30, -31, whatever it takes. I don't know that specific brand, but they are pretty simple with push to click fittings. I don't like em much since they have a run off that has to go to a drain.
The sad part is that I've worked for Culligan for over three years in bottled water delivery, but now I'm being dropped into the deep end of water softeners and filtration systems with virtually zero training. (I have, however, learned just enough to pretend that I know what I'm talking about.

)
BTW, thank you for reminding me that I need to bring the tools to cut a hole in the drainpipe!