Divergent thinking to the rescue:
It overwhelms the bottle-funnel occasionally, but the water is not inside, not in the basement, and a lot of it is going to fruit trees and grapevines.
It's not the greywater system I'd really planned, but it works fine for now. At least until we figure out the drain and/or a better method for diverting it into the garden.
Which is looking pretty lovely right now, if I do say so myself. Harvests are just starting to feel as though I ought to get out there every single day, just in case.
In other news, someone turned seven this week and learned how to float on her back in the pool.
It's a pretty good summer so far.