armdiver
If it is at the end of the field, your drain bed is probably clogged or has seen its’ day. If you have room, you could lengthen it. It probably won’t resolve itself. A product called “Amerisep Super” claims to unclog grease over a period of 90 days or less, but didn’t work for me. I ended up elongating my field by 70 feet and is percolating fine.
