Eliminating Pump by Switching to Rotor Heads on Municipal Supply

A homeowner with 35 PSI municipal supply (1 block from water tower) wants to replace a failed 1/2 HP pump and 4 Maxi-Paw heads per zone with rotors, hoping to eliminate the pump entirely.

Feasibility Analysis

• Current: 4 Maxi-Paws @ ~3 GPM each = 12 GPM per zone
• Proposed: 4 Rotors @ 1-2 GPM each = 4-8 GPM per zone
• Available: 35 PSI municipal supply through 1-1.25" line

Recommendation

Yes, eliminate the pump. Rotors use significantly less water than impact heads. Hunter PGP-ADJ rotors with appropriate nozzles (1.5-2.5 GPM) will operate well at 35 PSI. You'll get equal or better coverage with 1/3 the flow demand.

Verify: 1" or 1.25" supply line can deliver 8-10 GPM at 35 PSI with acceptable pressure loss. If current system works with Maxi-Paws on pump, rotors on municipal supply will work with better efficiency.