Inspections of PVC sewer pipelines often reveal small longitudinal gaps between the spigot end and the bell shoulder of the gasketed joints. These gasp are not flaws.Â
UV radiation from sunlight can affect the outermost surface of PVC pipe. However, even after prolonged exposure, there is no practical effect on PVC pipe’s performance characteristics. Â
This document has been developed by the PVCPA for use as a field tapping guide. Recommendations for equipment/procedures are included for tapping PVC PP and PVCO PP.
 For more than 50 years, PVC has steadily taken market share from ductile iron and other pressure pipe materials. The reasons most often mentioned by utilities are attached.
PVC vs Ductile Iron (DI) Pressure Pipe for water mains; A Comparison Based on 60 Years of Waterworks Experience
Technical Guides
Waterworks
PVC pressure pipe can be installed without special backfill since external loads are not design-limiting. For PVC gravity sewer pipe, on the other hand, backfill material and compaction are key components of design.
To achieve a change in direction (vertical, horizontal, or a combination of both), one method is axial deflection of the gasketed pipe joints.Â
This calculator was developed in accordance with the equations and procedures found in the Handbook of PVC Pipe Design and Construction.Â
Underground piping systems are at risk from ground movements, from a combination of weather, geologic, and seismic conditions. Movement can be slow, intermittent, or rapid.