PVC-U Pipe Selection for Residential Construction: A Spec Map
For residential construction, specify unplasticised PVC (PVC-U) in SCH 40 for cold-water supply, DWV, and irrigation mains at 40-80 PSI, and cap any service line at 60°C (140°F). Do not use PVC-U for hot-water distribution; switch to CPVC above 60°C, and require NSF/ANSI 61 + UPC certification for a
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