I'm looking to replace "Nuvo Home" with a Aquasure salt-based water softener (Harmony Series 48,000 Grains). Installation process seems to be straightforward, but I'm not sure where the drain line should go in my garage. There's no floor drain, but my Navien tankless water heater's condensation drain line connects to a tube coming out of my drywall as shown on the picture.
There's actually another tube, which is cut and open (not connected to anything). The previous home owner had a salt-based water softener which he replaced with Nuvo home, so it's possible that the open tube was previously connected to drain of water softener.
My question is, what would be the proper way to connect drain line from water softener?
- Connect the drain line to this "open" tube, if it's connected to drain. Is it a common practice to leave a tube unconnected like this, maybe to function as an airgap?
- Put a Y-splitter in the green arrow so that drains from both water softener and heater are connected to the same tube?
My apologies for improper terms (I'm a newbie). Any help would be greatly appreciated!