Thanks for this answer. I was wondering this myself recently, most I see around here just run outside but it doesn't seem very professional.You really want a vented drain. Dumping water outside is a big no-no here. Indirect waste the softner hose into it. I would guess backwash at maybe 7 gpm on a residential unit?
I usually waste them to a 2" p-trap that is vented of course with a 24" riser out the top of it to keep it from over-spilling. Don't forget your air-gap.
Should have been more specific. House is on septic. I am concerned with the constant dumping of backflush and sediment build up.
Does chicago use combined sewers?Chicago code does not allow anything to drain outdoors, including gutters.
A typicall 30k grain softner will back wash using apprx. 75 gallons of water per regeneration. You can dump them into the sanitary, but they must be trapped here. You can also take appropriate measures to drywell them.How much volume does a softener put out during backflush? I have one I may need to drain outside.
Yes, all of Chicago and most of the Cook co. suburbs have combined sewers. The suburbs allow gutters and sump pumps to drain to the outdoors.Does chicago use combined sewers?
If so, how does the poop plant handle all that storm water?