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Ear Brand UPVC Expansion Coupling Pn10 (F1970) NSF-Pw & Upc. 50-Year Warranty Coverage: Provides comprehensive 50-year warranty for all mechanical defects and failures. NSF and UPC Certified: Meets strict NSF-PW and UPC standards for safe pressure applications. Flexible Oldham Structure: Features flexible Oldham structure for easy installation and stress relief. Wide Size Range: Available in sizes from 1/2 inch to 4 inches for various pipe needs. Multiple Color Options: Offered in White, Black, and Grey to match different piping systems. OEM and ODM Services: Flexible customization and OEM/ODM services available for branding. ISO Certified Quality: Manufactured under ISO9001 and ISO14001 quality management systems.