Are they dealing with blackwater or copper or pex? Because any fool can do pex and soldering honestly doesn’t take much skill, and no amount is too much for dealing with some stranger’s blackwater.

I get the not having to part, but I wish it was acceptable to have one in our backyards.

If it’s well built, they’ll be less odourful than a standard toilet/bathroom by drawing air away from where it’s the worst.