How Long Do Plumbing Supply Lines Last? (2026 Data)

Plumbing supply line lifespan in 2026: copper 50–80 yrs, PEX 40–50 yrs, polybutylene replace now. Material-by-material data and red flags.

About HomeScore

HomeScore forecasts repairs, replacement timing, and total ownership cost across 40+ home systems. Used by 8,200+ buyers, sellers, and long-term homeowners in 2026.