A hydrant with a large capacity is typically connected to which part of the distribution system?

• A. Secondary feeder
• B. Primary feeder
• C. Service line
• D. Distribution valve

Answer: (B)

Hydrants that need to deliver large flows are placed on the primary feeder because this main carries the highest capacity within the distribution system. The primary feeder acts as the main conduit feeding downstream feeders and hydrants, so its larger size and lower losses allow the hydrant to deliver the required volume during firefighting. A secondary feeder serves a smaller area and can’t reliably provide the same high capacity. A service line is the individual customer connection and isn’t intended for large, system-wide discharge. A distribution valve is a control point, not the main supply for hydrants. So, the hydrant with large capacity is connected to the primary feeder.