Where PVC Shines
Schedule 40 PVC is rigid, easy to solvent weld, and ideal for straight mainlines with predictable trenching.
Where Poly Wins
Polyethylene handles curves, rocky soils, and quick repairs with barbed fittings and clamps—common on laterals to valves.
Depth and Code
Follow local depth tables and separation from other utilities. Mark depth on as-builts for future locators.
Hybrid Designs
Many systems use PVC headers with poly flex into valve boxes—document both materials for service teams.
Frequently Asked Questions
Is poly okay for mainline?
Yes when rated for pressure and properly bedded—check class and OD.
Do I need thrust blocking?
Follow engineer guidance on high-pressure PVC turns and tees.
