Softener Drain into Main 4" Line

[cubs1992]

Hello!

Currently I have my water softener draining into my floor drain with an air gap and that floor drain connects to the ejector pit. Every time my softener regenerates the pump needs to run almost the entire time during regeneration. I do not like relying on this pump to prevent overflow and extremely dislike salt water interacting with the pump.

I would like to add a wye into my 4" horizontal sewer line that contains a p-trap, standpipe and air gap-cap device. Do I need to vent this drain tie-in?

 

[Reach4]

You need a vent.

While an AAV would work, I think it would not meet Illinois code.

 

[Sponsor]

 

[cubs1992]

Any issues with tapping into the existing vent coming up from the ejector pit?

 

[ditttohead]

AAV's are neat but should be avoided.

 

[Reach4]

I think the vent could join the pit vent 6 inches or higher above the top of the standpipe. I don't know what the minimum height for the standpipe is. The flow will be under 5 gpm, and probably under 3 gpm -- much less than for a washing machine.

You could run the drain up to the floor above if that helps.