Evaluate the site location for the mound system to determine if site meets recommended soil and site criteria.
Lay out the distribution area, basal area, and overall footprint of the mound.
Mow the grass and remove the cuttings from the mound location. Dig a trench for the pressure pipe, which will bring the septic tank effluent into the center of the mound.
The trench should be adequately bedded and filled with granular backfill to reduce settling.
Lay out the main, manifold, and laterals. Cement all tees and joints to prevent leaks and pressure losses.
Drill 1/4 inch diameter holes in the laterals. Slide a smaller diameter pipe back and forth inside the distribution pipe to knock off any pieces of plastic that may clog the system.
Install an observation port to serve as a window into the mound to check for ponding of wastewater on the sand surface.
A valve box works well to house the turn-ups so they can easily be located and accessed for regular maintenance.