Diagnosing Pressure Drop in a Hunter MP Rotator Zone: Split or Fix?

Zone 4 (6 MP Rotators) Shows 20+ PSI Dynamic Pressure Drop

A 20–24 PSI drop from static to dynamic is normal for a new system. Before splitting the zone, verify:

• Valve flow control is fully open (if equipped).
• No leaks in the zone piping.
• Valve interior is clean; diaphragm and solenoid are good.
• All other zones perform well on the same 1″ mainline.

If everything checks out, the loss is inherent to the design (meter, backflow, elevation, friction). Provide full system details for a precise loss calculation.