My septic tank is backing up and no one can find it! One plumbing company spent 4 hours looking and finally gave up, they even snaked the pipe on the roof! The previous owner says he removed a large tree where the patio slab is now located before pouring the slab and thinks it may be under the slab. I always thought you wouldn't have planted a tree over a septic tank to begin with. My neighbor says that her septic tank is out about 10' from her house to the left. Help!!
