D-Boxes

 At Cornerstone Precast, we now manufacture 8-port and 10-port precast concrete distribution boxes (D-boxes) designed for long-lasting performance in septic systems and drainage applications. Each D-box is built with high-strength concrete to ensure accurate flow distribution, structural durability, and resistance to corrosion and ground movement.

Our concrete D-boxes are precision-molded for consistent quality and easy installation on residential and commercial job sites. With multiple port configurations available, they provide a dependable solution for any wastewater distribution or stormwater management system.

Choose Cornerstone Precast for reliable, American-made distribution boxes that deliver strength, stability, and value to every project.

4 Port and 12 Port D-Boxes Coming Soon!