Here are few more build photos. Since I am on the subject of crappers here is how I did my septic. Very basic set up.
Single 4" drain with a Y for the 2" sink drain. The blue PEX line is the water line coming in from the house. I had that buried a few months prior when we did other excavation work for the house.
The drain from the barn. Only about 12' from the barn to tank. I vented the drain just outside the barn.
500 gallon tank I managed to salvage. It had big cracks and no lid. I repaired the cracks with construction adhesive and made up a lid from a 55 gallon drum lid. Someday I will get around and pour a more permanent concrete lid. The metal drum lid will eventually rust away. I ran a single drain field 30' long. You can kinda see it behind the propane tank.
I had enough drain stone left over from the septic on the house to finish this project.
