In a high-rise building, pressure reducing valves (PRVs) are an important component in the water distribution system.

• A. False
• B. Not applicable
• C. Both
• D. True

Answer: (D)

In a tall building, water pressure varies with height because the water column creates significant hydrostatic head. A pressure reducing valve is used to bring that incoming pressure down to a safe, workable level for the entire distribution system. This protects piping, fittings, valves, and fixtures from overpressure, reduces the likelihood of leaks and water hammer, and helps ensure that upper floors still receive adequate pressure while lower floors aren’t subjected to excessive pressure. It also helps maintain proper pressure for fire protection systems, such as sprinklers. Because managing pressure across the vertical distribution is essential in a high-rise, PRVs are indeed an important component of the water distribution system.