Technical FAQs

What is the maximum burial depth for PVC sewer and pressure pipe?

The maximum burial depth is the maximum depth the pipe can be buried without the pipe deflecting more than 7.5% for gravity sewer or 5% for pressure pipe. Some municipalities require a maximum pipe deflection of 5% regardless of pipe type. Maximum burial depth depends on multiple factors such as pipe stiffness, bedding material and compaction (Soil Modulus - E'), and the presence of any additional above ground live loads.

Please refer to the following Technical Bulletin: Burial Depth Guidance for Gravity Sewer PVC Pipe