What is the required strength of pipes used in drainfields?

The required strength of pipes used in drainfields is SDR35 or stronger. This specification indicates that the pipe must have a certain wall thickness and pressure rating that ensures durability and reliability in an underground septic system application. SDR, which stands for Standard Dimension Ratio, is a rating that defines the ratio of the pipe's diameter to its wall thickness. A lower SDR number indicates a thicker wall, which can better withstand soil pressure and occasional impact.

Using SDR35 or stronger pipes ensures that the drainage system can effectively handle the demands placed on it, such as soil weight, moisture fluctuations, and the potential for root intrusion, all of which can compromise weaker pipes. Utilizing the appropriate strength is crucial for maintaining the long-term functionality of the drainfield and preventing failures that can lead to costly repairs and environmental hazards due to sewage leaks.