Which solid pipe schedule is ideal for on-site sewage disposal installations?

Schedule 40 pipe is commonly chosen for on-site sewage disposal installations due to its appropriate pressure rating and wall thickness, which provides the necessary durability and strength for wastewater applications. This pipe schedule is designed to handle the demands of both gravity-flow systems and pressurized applications, making it versatile for various types of septic systems.

Its dimensions and pressure rating ensure it can withstand potential external loads and stresses from soil and environmental factors. Schedule 40 is also compatible with standard fittings and components typically used in septic system installations, facilitating easier assembly and installation in the field.

Other pipe schedules, such as Schedule 25, are designed for lower pressure applications and may not offer the same level of durability needed for sewage disposal. Schedule 50 is typically not a recognized standard for sewage applications, while C900 PVC is aimed more at water transmission and may not be suitable for the corrosive environment found in sewage systems. Therefore, Schedule 40 is the most suitable choice for ensuring the performance and longevity of on-site sewage disposal installations.