PVC drainage pipe is rigid, solvent-welded, and low-cost, making it common for indoor and buried gravity drains. HDPE is flexible and heat-fused for leak-free, root-resistant joints, favored where ground movement, long runs, or higher durability matter.
| Property | PVC Drainage | HDPE Drainage |
|---|---|---|
| Material | Polyvinyl chloride (rigid, unplasticized PVC-U) | High-density polyethylene (flexible thermoplastic) |
| Joint method | Solvent-cement welding or push-fit rubber ring | Butt fusion, electrofusion, or mechanical fittings |
| Temperature | Typically suited to about 60 °C continuous discharge | Typically suited to about 60 °C, tolerates brief higher peaks |
| Flexibility | Rigid; needs fittings for direction changes | Flexible; can bend and absorb ground movement |
| Best use | Indoor soil/waste stacks and shallow buried gravity drains | Buried mains, long runs, and areas with settlement or tree roots |
| Standard | EN 1401 / ASTM D2665, D3034 | EN 12666 / ASTM F714, D3350 |
Typical industry values for planning — confirm exact figures against the manufacturer datasheet and local code before ordering.
Choose PVC for cost-sensitive indoor waste and soil pipework or straightforward shallow gravity drainage where joints stay accessible and ground is stable.
Choose HDPE for buried lines needing fully sealed, root-resistant joints, long continuous runs, or ground subject to movement, settlement, or vibration.
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