SEWAGE DEPARTMENT TRAINING PROGRAM
How to Build an Elevated Sandmound Sewage Disposal System
The piping is then covered by a minimum of 2 inches of aggregate. The aggregate should be raked level across the entire bed. Do not cover just the piping.
The pipes (red) are covered with 2 inches of aggregate which is leveled over the bed.
Mounding aggregate over the piping is not acceptable.
