Section .1900 - Sewage Treatment and Disposal Systems

Backfill sand shall be a clean, screened, medium-grade sand that is naturally-occurring.  Acceptable sands are sands that are suitable for the production of ready-mix concrete and clean of organic debris and stone.  Sands dredged from rivers and creeks can be used, if gradation is sufficient to be blended into ready-mix concrete production.  Product description includes, but is not limited to: Concrete Sand, NC-2S Sand, ASTM C-33 Sand, FA-10 Sand and Grade “A” Sand.  Product suitability is important and T&J Panel, Inc. will help answer any questions.  Click here for a county by county list of potential sources of backfill sand.  Be sure to check with these sources to ensure they supply the correct type of sand.

Approved Backfill

North Carolina's Laws & rules regarding septic systems

Design and installation of T & J Panel Septic systems must be in accordance with the NC .1900 Rules governing Sewage Treatment and Disposal Systems.  T & J Panels (PPBPS) are addressed in section .1956(3)(a)(ii).  PPBPS are also included in the 18E Draft Rules under section .0905.  Click the image above to view a copy of the current .1900 Rules.

Do not hesitate to reach out to a design consultant with T & J Panels to help answer any questions you may have regarding the use of panel block systems.  We help with LPP system design, manifold design, on-site consultations, and any other service that might be needed in the field.  Please contact Brad Johnson directly at (704) 880-7697 with any questions pertaining to design or use of a T&J Panel System.

Design & Inspection

Current .1900 rules

Preferred distribution methods

Design Consultation

Please utilize these design and inspection resources while designing and inspecting the T & J Panel Wastewater Treatment System in North Carolina.  If you have any site specific questions, please do not hesitate to contact our offices at (704) 924-8600 to speak with a consultant.

Inspection Checklist

Lines 67ft. or less - Gravity Flow

Lines 68ft. - 85ft.
- Pressure Manifold

Lines longer than 85ft.
- LPP (follow LPP design requirements)

NOTE: These are preferred scenarios, however special design can be made on a site by site basis. Please reach out to Brad Johnson at 704-880-7697 with any questions regarding these recommendations.

This inspection checklist is included in the T & J Panel Design, Installation, and Maintenance Manual ​ for further reference.

​1) Is the depth of the panels within guidelines?​
​2) Are drain lines level or within less than 1/4 inch fall per 10ft?
​3) Have seals been properly constructed?
​4) Was the proper sand used in the trench backfill?
Is the sand clean? (i.e. free of debris, large organics, leaves, etc.)
Has the sand been screened? (to a medium-grade, not too fine, free of large rocks)
Is the sand naturally-occurring? (i.e. from a river, creek, sand pit, etc., not manufactured)

​5) If in soils where clay is present, were the sidewalls raked and limed?
​​6) Were panels installed horizontally or vertically, according to the permit?
For Pumped Systems:
​7) Have pump size, head pressure and dose cycle been properly sized and set?
Set dose cycle for 3.6 gallons per panel with pressure distribution
Set dose cycle at 3.6 gallons per vertical panel and 7.2 gallons per horizontal panel when pumping to pressure manifold and gravity feeding.

​8) Record field data on operations permit.