jutting sideways mid-corner from its origin and passing the sink drain on the new sink. This would be solvable, except the garbage disposal on the other side of the sink has a connector headed for the same drain.

Now imagine: drain A needs a p-trap, one of those little half-u bends that traps nastiness and prevents odor from the drain reaching the kitchen; and drains should always be as direct, short, and efficient as possible. They also have to be higher than the exit drain.

The drain from the new disposal, which we did get mounted, goes sideways and contests for the same drain. We cannot have it go ‘up’ to meet the drain. The best we can figure is to T both drains above a p-trap that goes to a pipe that goes to a drain. It is all, thank goodness, PVC, until you get to the iron pipe. I’d go with hose, because I don’t want any right-angle bends to catch stuff. But Jane says go with pipe: she doesn’t trust hoses. So I’m going to go in there and try to sketch the situation to take to the hardware store. We won’t have water in that sink until we can hook up the drains.

It’s gravity at its finest. Roman style plumbing. You just have to design the most efficient route to get both lines to the drain.