DIY Well Pump Jerks With Sprinkler: Flow Test & Air Leak Checks

New Shallow Well Pump Surges With Sprinkler Attached

Drilled 24 ft, water at 13 ft. ¾ HP Water Ace pump works with hose but jerks violently with sprinkler. Need more data to diagnose.

Critical Missing Info

• Well casing diameter (2", 4", 6"?).
• Flow test results: GPM at what PSI?
• Sprinkler type (impact, rotor, spray?) and nozzle size.

Likely Causes

1. Over-pumping the well: Sprinkler demand > well recovery rate. Pump cycles on/off (jerking).
2. Air in suction line: Leak at fittings, check valve, or foot valve. Pump loses prime intermittently.

Next Steps

Run a bucket test: Time how long to fill 5 gallons with hose only. That's your max GPM. If < 5 GPM, a single sprinkler may exceed supply.

Reply with well size, flow test, and sprinkler details for specific pump/nozzle recommendations.