What is the pressure differential for a high-rate sand filter?

The pressure differential for a high-rate sand filter is typically set at 15 psi. This measurement is vital because it indicates the filter's operational efficiency and helps determine when the filter needs to be cleaned or backwashed. When the pressure differential reaches this level, it signifies that the filter is becoming clogged with debris and that there is a decrease in water flow through the system. Maintaining this pressure differential ensures optimal performance of the filter, assists in protecting equipment, and keeps the pool water clean and safe for swimmers. Monitoring this pressure is crucial for pool operators to maintain proper water quality and system functionality.