Which type of piping is not acceptable for the line from the building to the treatment tank?

The line from the building to the treatment tank must meet specific codes and standards to ensure safety and functionality in septic and wastewater systems. In this context, ABS plastic pipe is not acceptable for this application primarily due to its susceptibility to certain environmental factors and chemical interactions that can compromise its integrity in underground installations, especially in wastewater scenarios.

Cast iron, SDR 26 plastic pipe, and Schedule 40 plastic pipe are all recognized and acceptable options in most systems because they provide the necessary durability and resistance to degradation in such environments.

Cast iron is often used for its strength and longevity, while SDR 26 and Schedule 40 plastic pipes are engineered to withstand various pressures and chemical exposure. Each of these alternatives has been tested and approved for use in sewer and drainage applications, making them reliable choices for transporting effluent from buildings to treatment tanks. In contrast, ABS lacks the same level of robustness regarding exposure to potential corrosive elements found in certain waste materials, leading to its disqualification for this particular piping requirement.