Save yourself hours the guide is the worst guide I have ever came across. It will talk about the fittings that the company doesn’t include. It will tell you on most sites not to use PTFE and in the guide but Please use the tape! Or you will have water everywhere. Like I did. After hours of cleaning water up. I went a brought 2 shark bite water softener connections it was that easy. Please save your time. The company has the worst CS ever. Good luck.