What is the typical water pressure range for water mains?

The typical water pressure range for water mains is generally understood to be between 20 and 80 psi (pounds per square inch). This range is considered optimal for supplying water effectively for both residential and commercial uses, including fire protection systems.

Water pressure below 20 psi may not be sufficient to adequately supply water to homes or businesses, especially during peak usage times, while pressure exceeding 80 psi can pose risks of damage to plumbing fixtures and systems. Ensuring that water mains operate within this range allows for reliable access to water while maintaining safety and efficiency in the supply infrastructure. This is why the answer falls within the 20-80 psi range, reflecting standard operational parameters for municipal water systems.