We've been using top loading washers for 10 years and dumping into a septic system. We pump the tank once a year as there is a buildup of sediments from the fleeces, ie fine dirt. No problelms with grease and the laterals are working just fine. We deal with many hundreds of pounds of fleece a year.
The newer washers have a higher spinning RPM than the older top loaders. They act more like commercial extractors. Gail White To stop mail temporarily mailto:[EMAIL PROTECTED] with the message: set nomail To restore send: set mail