This document is the 911A 11in Biodiffuser Serial Installation Detail. Details with descriptions and notes are included.

The details show the ADS sewer and drain and/or ADS triplewall OR per local regulations, the distribution box and inspection port.

Notes state to excavate trenches to proper width/depth. Smooth irregularities in the excavation to a level, flat surface. Assemble biodiffuser leaching chambers and universal endplates together in trenches. Install universal end cap and secure in place with backfill. Punch out pipe hole openings in the end plates and connect inlet pipes. Fill sidewall area to top chambers with native soil. “Walk-in” fill to compact soil along sides of biodiffuser to achieve load rating. Cover biodiffuser leaching chambers to a minimum of 12” of granular cover after consolidation for H-10 applications.