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NSF/ANSI 358-3-2026

Cross-linked Polyethylene (PEX) Pipe, Tubing, and Fittings for Water-Based Ground-Source (Geothermal) Heat Pump Systems

The physical and performance requirements in this standard apply to plastic piping system components as well as non-plastic components of the ground loop heat exchanger including but not limited to cross-linked polyethylene (PEX) pipes, tubing, and fittings used in water-based ground-source heat pump systems.

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NSF International [nsf]

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