Schedule 40 & 80 Pipe Dimensions — NPS Sizes for PVC, CPVC & ABS
NPS Pipe Dimensions NPS (Nominal Pipe Size) is the North American standard for pipe sizing. Like NPT threads, the “nominal” size doesn’t match the actual dimensions — it’s a naming convention that’s been around for over a century. The OD is constant for a given NPS size. The schedule (40, 80, etc.) determines wall thickness … Read more