washing dishes-is grease and food safe down sink drain?

Chrisatthebeach wrote:
I lived in mine full time for three years during a job relocation, while I did not pour grease down the drain I washed dishes the same as I did at home, no problems at all. I did on occasion clean the gray tank by filling with water, bleach and laundry detergent and let soak before dumping, just to keep things fresh.