TOWA - Texas On-Site Wastewater Association

NSF  - NSF International

TCEQ  - Texas Commission on Environmental Quality

OCIA - Oklahoma Certified Installers Association

Comal Concrete - Quality Precast Concrete Products

D.I.R.® is a registered trademark of D.I.R.® Manufacturing & Supply, Inc.
Patent #7879230  - Patent #7874462


Proud to be an American Manufacturer!

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