In testing, the Presby Maze® has trapped a minimum of 92% of the suspended solids (standard septic tanks are designed to trap ~70% of the solids.) This testing includes a commercial system that services 20,000 gallons per day of high strength wastewater.
By using the Presby Maze®, commercial and residential leach fields have been granted a reduction in footprint up to 35%! The percentage of reduction varies depending on the state. Currently New Hampshire allows up to a 25% reduction. This is the only commercial reduction ever allowed for passive systems by the State!