XH, or Extra Heavy, refers to pipes or fittings that have thicker walls compared to standard or Schedule 40 components. Extra Heavy pipes and fittings are designed for high-pressure applications, providing added strength and resistance to damage. They are commonly used in industrial settings, commercial buildings, and high-rise structures where greater durability is required to handle higher pressures, temperatures, or abrasive fluids. Proper installation of Extra Heavy components ensures safety, compliance with plumbing codes, and long-term system integrity.
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