||12-28-2011 08:37 AM
Without details it is impossible to accurately assess your situation. I can tell you that I had a similar situation in my house, in that the laundry drained into the floor drain, which ran out to a drywell, while the sanitary waste went to the septic system via a 4" diameter PVC drain line to the septic tank. This was when I purchased the house in 1991.
None of this met current code. The septic system was replaced, and the laundry drain was connected to the septic drain line. I still have a floor drain in the basement, however it is only used when I mop the floor (this is VERY rare). Certainly in Massachusetts, and probably in most other jurisdictions, it is illegal to run greywater (laundry) directly into the ground, it has to go to the septic system.
The reason for this in my town is that we are all on private water (well), so you are effectively drinking your laundry water, which tends to be high in phosphorus, so it is considered essential that all wastewater be treated via the septic system. Your jurisdiction may have different rules, especially if you are on town water, you need to check with the local board of health or the building inspector. No one on this forum can possibly know your local regulations.