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Septic Systems

Although all septic systems are similar, there are several variables which determine the final system. Traditionally, most systems have a main septic tank, which is connected to a distribution box. The leach field is then laid out from the distribution box. Such variables as soil condition and lot size determine which system is acceptable to install on the property. For some installations, a perimeter tile may also be required . Below are our most common system installations.

Stone & Pipe System
Stone & Pipe System

Stone and pipe septic systems are one of the first true septic systems. They have been around for years and you can still find a stone and pipe that is 30 or more years old working efficiently if it was installed correctly, properly maintained and used properly. They are relatively large in size and are not suitable for all lots or areas. They have a 4" perforated PVC pipe laid on top of 6" of septic stone at a center to center spacing of 7 1/2'. The septic stone itself varies in size from 1/2" to 2 1/2". Then stone is placed in between each PVC pipe and 2" is placed on top. Geotextile fabric is then placed on top so sand, dirt, and other contaminants do not enter the clean stone.

Chamber Panel System

This is a good option when space is limited for a septic system or when the lot requires curved leach fields. Engineered for strength and performance, a chamber system has greater design flexibility, including a smaller footprint as compared with stone and pipe and less site disruption. Since a chamber system typically occupies a smaller total area than stone and pipe leach fields, there is less disruption to property and landscaping. The elimination of stone means easier cleanup at the job site.

A solid top prevents infiltration of rainwater and the intrusion of fines. Sidewall louvers allow lateral leaching and evapotransportation. An inspection port cutout permits monitoring and maintenance. Chambers interlock end-to-end with a precise fit. Advanced contouring connections allow chambers to avoid obstacles and the open bottom provides unobstructed soil interface, allowing up to 75% reduction in trench length.

Chamber Panel System
Presby Enviro-Septic® System
Presby System

This revolutionary onsite treatment system removes up to 98% of wastewater contaminants, recycling clean water into the environment and recharging natural water supplies. Enviro-Septic® Technology uses an all natural process to effectively treat wastewater. It is adaptable in size from the smallest seasonal residence to large commercial and community installations.  When treating high strength wastewater in an extremely small footprint, it can be installed in a multi-level configuration.  This configuration makes many previously unusable sites usable and has become popular among restaurants and fast food chains. Some advantages of this system over a traditional stone and pipe system are that it:

  • requires much less area

  • lasts longer;

  • requires no stone;

  • treats wastewater more effectively;

  • adjusts easily to difficult sites and slopes;

  • uses recycled plastics.


This system requires installation by a Presby Environmental certified installer. We have been certified since 2009. Our certification number is 7294INES. Click here for a more detailed brochure on the Enviro-Septic® Wastewater Treatment System.

Sand Mound System

A sand mound system is an on-site sewage disposal system that is elevated above the natural soil surface in a suitable sand fill material. Gravel-filled absorption trenches or beds are constructed in the sand fill, and effluent from a double-compartment septic tank is pumped into the absorption area through a pressure distribution network. The use of an effluent filter in the outlet end of the septic tank is required. Pretreatment of sewage occurs in the septic tank, and additional treatment occurs as the effluent moves downward through the sand fill and into the underlying natural soil. The purpose of the design is to overcome site limitations that prohibit the use of conventional systems. 


The design can overcome the following site limitations: 

  • high water tables;

  • shallow soils over fractured bedrock;

  • slowly permeable soils.

Mound Septic System
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