Pipe Sizing for Plumbing and Heating Systems: Flow Rates, Pressure Loss, and UK Regulations
Correct pipe sizing is fundamental to a well-functioning plumbing or heating installation. Undersized pipes cause low flow rates, excessive velocity noise, and high pressure loss. Oversized pipes are costly, slow to heat, and prone to stagnation in cold water supplies. This guide covers the principles of pipe sizing for domestic hot and cold water supplies, central heating circuits, and drainage — with reference to UK standards and common design tools.
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