What is the minimum GPM required through a bypass in a water distribution system?

The minimum GPM required through a bypass in a water distribution system is set to ensure that there is adequate flow to maintain system pressure, prevent stagnation, and help in maintaining water quality. A bypass allows water to flow through another path when the primary route is either unavailable or under maintenance. A flow rate of 3 GPM is often established as a balance between ensuring sufficient velocity and pressure within the system while also preventing sedimentation and the stagnation of water. This flow rate is typically sufficient to keep the system dynamic, ensuring that any potential contaminants are displaced and that the water remains fresh for consumption.

Choosing a lower flow rate might not adequately address operational needs, while a higher flow may not be necessary and could impose unnecessary energy costs or strain on the system. Hence, 3 GPM is seen as the optimal choice for bypass flows in many systems, aligning with standards or recommendations in water distribution practices.