and availability. Drainage HD LEACHING PITS 6 X3 4 WALLS 6'X4' 4 WALLS 6 X6 4 WALLS 6 H.D. COVER 8 X4 4 WALLS 8 X6 4 WALLS 8 X8 4 WALLS 8 H.D. COVER *****COVERS AND BARRELS AVAILABLE.... Leaching Products Benson Enterprises manufactures precast concrete products including leaching chambers. Pre-cast concrete leaching chambers have been used in the sewage/drainage... industry for many years. They have provided designers/contractors with the ability to design a solid foundation for heavier traffic. Our Leaching Product line consists of various...