Water Softner Backwash... is this okay? | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

We had two "water specialists" come by today because we wanted to hear what their plans were with regards to water softener setup and backwash. We already decided that we absolutely will not permit the backwash to be tied into our (very small) septic system. We will likely do the work ourselves (have enough experience). For clarity, I created this graphic to try and explain what they want to do:

We have a 1986 split entry home where our basement...

Water Softner Backwash... is this okay?