I had an old home construction book from 1945 that showed what was called a Slush Pit. Honest, I thought this was a political term until I read about it! The toilet flushes straight into a deep pit with leaky gaps in between the bricks. The leach field is all the surrounding area. It's simple to build but wasn't up to code even then. I've used them in Mexico. When you got to go you use what you got.

I had an old home construction book from 1945 that showed what was called a Slush Pit. Honest, I thought this was a political term until I read about it! The toilet flushes straight into a deep pit with leaky gaps inbetween the bricks. The leach field is all the surrounding area. It's simple to build but wasn't up to code even then. I've seen them being used in Mexico.