Good people of Port Huron. I would like some advice before I dynamite my home. It's an old home whose basement is flooding, but not via the foundation walls. there is a hole in the cement that is backing up. It started to back up this week only when the washer emptied into the sink, or the backwash from the water softener. Not when shower is used or toilets. My septic field and tank were new in 2001. Could it be back up from this? No ODOR to this water. Do I call a plumber or septic person? Recommendations for reasonable plumbers and septic companies welcomed. TIA