Re: Weird old Trench Drain question
I've seen the type of drain you mention. These were usually installed after the fact, often by cutting out the floor (or not pouring the slab all the way to the wall), to alleviate moisture problems. Nowadays proper drainage is installed outside of the foundation, but back in the day nobody did that.
I would guess the drain was filled in/blocked by accident, by someone who meant well but didn't understand the problem, or by fill material sloughing off from under the slab. If I were in your situation, I'd clean out the drain so it works properly.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.