End of the line where the washer is.
Newly installed fittings and pipe tend to be easier to split apart. We take our time with that stuff. We don't like breaking concrete either.
Excellent. I will add a clean out there while I'm at it.
Good to know about the pipe. I will look more into this. If it was just the concrete I wouldn't mind so much, it's having to rip up the flooring and all that that bothers me more. But if I have to, I have to.