Plumbing advice, tie into house drain?

[LifeIsGreat]

An ABS dishwasher drain fitting would be pretty good for attaching a water change drain hose.
https://www.rona.ca/en/abs-dishwashe...ter-0068254--1

[mseepman]

I tied my sump into the drain in my fish room (I actually put 3 accesses to my floor drains in my fish room) but it was tied just above the p-trap underneath the concrete from all three as you need to prevent sewer gas.

[hillegom]

My RODI drain is exactly like the above pic. Hasn't leaked in 15+ yrs.
I would use that upstream of the P trap any time.
But I would be leary to use that on the supply, pressure line. I have seen that before, but personally do not trust it.

[bauder1986]

Just make sure you have a gas trap installed. Sewer gasses are a pain in the ass.