What kind of pipe is required for the connection from a septic tank to a drainfield under paving?

When considering the connection from a septic tank to a drainfield under paving, it's important to select a pipe that can withstand the conditions of subsurface installation and provide durability and resistance to various environmental factors. PVC (Polyvinyl Chloride) schedule 80 is an appropriate choice for this application due to its higher pressure rating and thicker walls compared to schedule 40. This added strength makes it suitable for areas where soil movement or pressure from vehicular traffic could potentially damage the pipe.

Additionally, PVC schedule 80 offers chemical resistance that is valuable in plumbing systems involving wastewater, ensuring longevity and preventing leaks that could contaminate the surrounding soil. Using this type of pipe helps ensure that the system functions effectively over time without compromising its structural integrity.

Other types of pipes such as ABS (Acrylonitrile Butadiene Styrene) and galvanized steel do not meet the same level of performance for underground applications involving sewage. ABS is typically used for above-ground drainage and vent piping, while galvanized steel can corrode over time, especially in the presence of moisture and waste materials. Therefore, the selection of PVC schedule 80 is ideal for ensuring a reliable connection in this specific plumbing application.