I've not heard of these and I've lived on septic most of my life. I'll look into it. Septic tank and drain field were done 2 years ago to code.

This makes sense. I do plan to tie it together it just would require a lot of digging as I have to do it outside to get it to the tank. And the drain tile thing we had put in is pretty good, before it was a super cheap french drain!!! No plans to sell for a long time, 20+ years.

Well, maybe drywell was the wrong term. here is the work statement from the plumbing company: Use mini excavator to install infiltrator tile for drain system. Install 3 feet into soil in front of house. System will be 5 foot wide by 10 foot long. Repaired 3 inch piping coming out house into drain system. Homeowner to remove extra soil. Regardless, I can get in touch with them and see.

Ok, thanks for the info. I can talk to a plumber and the original company. The washer is in a spot that will be very difficult to tie into the drain system, it would have to go upwards through a false ceiling. I'd have to tie it outside which is probably another issue altogether. The previous company who did the drywell said it was a fine solution so, idk.