Our system

A unique approach to an age-old problem

A prefabricated, permeable block panel system that achieves 50% greater distribution than other systems.

Forklift loading panels in the T&J Panel yard

Built to do more in less ground

The T&J Panel System was designed to overcome the challenges faced by today’s wastewater agencies, builders and developers looking for a better way to treat wastewater. Through decades of research, testing and engineering, we believe we have developed the most advanced, hassle-free onsite wastewater treatment system in its class.

T&J Panels are manufactured in house, using a proprietary aggregate and a patented chemical process.

PERMEABLE BLOCK PANEL

DISTRIBUTION PIPE

GEOTEXTILE + SAND ENVELOPE

A cut panel showing the porous block and pipe channels

Panel benefits

Increased capacity

Because each block panel works as a temporary holding tank, overall capacity is nearly three times greater than conventional stone and pipe trench systems. Think of it as a network of miniature septic tanks spread through the drain field, not just holding the effluent but treating it before releasing it to the soil.

Our manufacturing process heat-treats the blocks, which creates thousands of micro-pores in each granule of aggregate. The result is a hyper-permeable surface that filters and stores effluent and increases the surface area for biochemical and microbial treatment. That porosity multiplies storage and hydraulic load capacity well beyond standard gravel and pipe.

The result is a substantial reduction in the line length required, and a much smaller drain field.

Cleaner output

In a block panel system, each panel serves as an individual pretreatment unit over and above the septic tank itself. In the T&J Panel system, the engineered block matrix, an integral geotextile fabric and the surrounding sand work together to create a highly aerobic environment, ideal for treating wastewater by filtration and absorption as well as chemical and microbial transformation.

This multi-step treatment produces pretreated effluent that percolates more readily into the natural soil and prevents harmful biomat growth from clogging the soil interface over time.

Close-up of the porous aggregate surface of a T&J panel

HEAT-TREATED AGGREGATE

MICRO-PORES STORE EFFLUENT

A line of installed panels in a sand-lined trench

Peace of mind

No one wants to install a wastewater system only to have issues a few years later. Because onsite wastewater is a regulated industry, our life expectancy data comes directly from the North Carolina Department of Health and Human Services and is limited to available data on failed systems. Based on NCDHHS data, our systems last 45 years on average, and that doesn’t count systems still in operation.

Every failed system we have inspected was the result of the wrong sand being used to envelop the system, or of grease and other contaminants going down the drain that are incompatible with any septic system.

When properly designed and installed, the T&J Panel system is a maintenance-free onsite wastewater solution that will outlast every other system in its class.

45 yrs

Average service life

~3×

Capacity of stone and pipe

NSF 40

Certified system

Before you get started

You must know the MSS (Minimum Suitable Soil).
Do you have your permit from the appropriate health department?
Is the required sand readily available in your location? View sand sources
Have you sourced an installer for your system?

Use the Calculators

Installer checking grade on a residential site

Design tables

Use these tables for help designing panel block systems.

Best engineering practices for parallel distribution

Distribution method	Line lengths from point of introduction
Low Pressure	Over 85 feet
Pressure Manifold	Up to 85 feet
Gravity Flow	Up to 67 feet

These design parameters are best engineering practices, allowing for the variability of conditions on site. For example, 370 ft lines with good fall may still consider gravity flow with a standard D-box. Longer lines can be center fed or multi-fed to keep a given distribution method: a 100 ft line fed from the center has line lengths of only 50 ft from the point of introduction. These practices do not apply to serial distribution.

Manufacturer’s specifications for reduced on-center spacing

Vertical panels

Site constraints	Design capabilities
Typical install	2 ft wide, 8 ft on-center
Initial and repair are panels* and 2 ft wide, 8 ft on-center will not fit	2 ft wide, 6 ft on-center
Repairing a lot and 2 ft wide, 8 ft on-center will not fit	2 ft wide, 6 ft on-center

* Drip or advanced treatment can be substituted for repair if necessary.

Horizontal panels

Site constraints	Design capabilities
Typical install	3 ft wide, 9 ft on-center
Limited by space	3 ft wide, 8 ft on-center
Initial and repair are panels and 3 ft wide, 8 ft on-center will not fit, or repairing a failing system and 3 ft wide, 8 ft on-center will not fit	2 ft wide, 6 ft on-center*

* Must install with at least 9 inches of backfill sand under the panels; advanced pretreatment may be used as the repair if necessary.

See page 3 of the installation manual for the manufacturer’s specifications on reduced on-center spacing.

Use the Calculators

Download the Manual