© Presby Environmental, Inc., Maine Design & Installation Manual, June 2019 Edition -2-
1.0 Background
Liquid that exits from a septic tank (“effluent”) contains suspended solids that can cause traditional systems to fail
prematurely. Solids can overload bacteria, cut off air required for aerobic bacterial activity, and/or seal the underlying
soil, interfering with its ability to absorb liquid.
1.1 What Our System Does
By utilizing simple yet effective natural processes, the Presby Treatment System treats septic tank effluent in a
manner that prevents suspended solids from sealing the underlying soil, increases system aeration, and provides a
greater bacterial treatment area (“biomat”) than traditional systems.
1.2 Why Our System Excels
The Presby Treatment System retains solids in its pipe and provides multiple bacterial surfaces to treat effluent prior
to its contact with the soil. The continual cycling of effluent (the rising and falling of liquid inside the pipe) enhances
bacterial growth. This all combines to create a unique eco-system that no other passive wastewater treatment
system is designed to offer. The result is a system that excels by being more efficient, lasting longer, and has a
minimal environmental impact.
1.3 System Advantages
a) costs less than traditional systems
b) eliminates the need for washed stone
c) often requires a smaller area
d) installs more easily and quickly than traditional systems
e) adapts easily to residential and commercial sites of virtually any size
f) adapts well to difficult sites
g) develops a protected receiving surface preventing sealing of the underlying soil
h) blends “septic mounds” into sloping terrain
i) increases system performance and longevity
j) tests environmentally safer than traditional systems
k) recharges groundwater more safely than traditional systems
l) made from recycled plastic
1.4 Patented Presby Technology
At the heart of Advanced Enviro-Septic®(AES) and Enviro-Septic®(ES), is a patented corrugated, perforated plastic
pipe with interior skimmer tabs and cooling ridges. All AES and ES pipe is surrounded by one or more filtering,
treatment and dispersal layers. Presby Systems are completely passive, requiring no electricity, motors, alarms,
computers, etc. AES and ES pipes are assembled and installed in a bed of specified System Sand which can either
be below the ground or above.
1.5 Advanced Enviro-Septic®(AES)
The Advanced Enviro-Septic pipe is assembled into an onsite wastewater treatment system that has been
successfully tested and certified to NSF 40, Class I (a certification typically given to mechanical aeration devices),
BNQ of Quebec, Class I, II, III and Cebedeau, Belgium standards. Advanced Enviro-Septic is comprised of
corrugated, perforated plastic pipe, Bio-Accelerator®fabric along its bottom which is surrounded by a layer of
randomized plastic fibers and a sewn geo-textile fabric. Advanced Enviro-Septic creates an eco-system designed to
simultaneously purify and disperse effluent after primary treatment by a septic tank. Advanced Enviro-Septic is the
“next generation” of our Enviro-Septic technology. The AES product incorporates Bio-Accelerator, a proprietary
enhancement that screens additional solids from effluent, accelerates treatment processes, assures even distribution
and provides additional surface area. Each foot of Advanced Enviro-Septic pipe provides over 40 sq. ft. of total
surface area for bacterial activity.
1.6 Enviro-Septic®(ES)
The Enviro-Septic pipe is assembled into an onsite wastewater treatment system. Enviro-Septic is comprised of
corrugated, perforated plastic pipe which is surrounded by a layer of randomized plastic fibers and a sewn geo-textile
fabric. The system is designed to simultaneously purify and disperse effluent after primary treatment by a septic tank.
Each foot of Enviro-Septic pipe provides over 25 sq. ft. of total surface area for bacterial activity.
