Different Question:
We have lived here 6.5 years. I grew up on septic system and don't put stuff down the drain.
I wouldn't even have a garbage disposal, but Mary Anne insists upon it. The most that goes down the sink is an occasional Lime or Lemon to make it smell better. ...rinsing off the dishes too.
Anyway, this house has the laundry room and the kitchen come to a clean out in the back before heading around the house and to the street for city tie in.
Every few months I open the clean out and duct tape a small ladle to a long skinny dowel and pull whitish gray chunks that resemble soap. When dislodged it floats.
What is this stuff? it smells awful and feels like fat or soap between my fingers.
Since we've lived here and been cleaning out the pipes the amount that builds up and breaks free is getting less and less, but we've been here over 6 years. If this is build up from previous owners and we don't put hardly anything down the drain shouldn't it stop?
Is it possible that we're using the wrong laundry detergent? Would that play a role in this build up?