Why Is My Water Pump Not Pumping Water? 9 Causes & Fixes

Your pump is running — you can hear the motor — but no water comes out. This is one of the most common and frustrating pump problems. Here are the 9 most likely causes, from easiest to check to most serious.

1. Air Lock (Loss of Prime)

The most common cause for monoblock/surface pumps. Air trapped in the pump casing stops it from lifting water. Fix: Open the priming plug and fill the pump casing with water until it overflows, then restart.

2. Foot Valve Failure

A leaking or clogged foot valve lets water drain back, losing prime every time the pump stops. Fix: Clean or replace the foot valve.

3. Low Water Level

The borewell or well water has dropped below the pump/suction point. Fix: Check water level; lower the pump or wait for recharge. Install dry-run protection to prevent damage.

4. Clogged Strainer or Suction Line

Debris blocking the intake starves the pump. Fix: Remove and clean the strainer.

5. Worn Impeller

Over years the impeller erodes and can no longer generate pressure. Fix: Replace the impeller.

6. Wrong Rotation Direction

On three-phase pumps, reversed phase sequence spins the pump backwards — it runs but pumps little or nothing. Fix: Swap any two phase wires.

7. Air Leak in Suction Pipe

A cracked pipe or loose joint on the suction side lets air in. Fix: Inspect and seal all suction-side joints.

8. Closed or Faulty Valve

A partially closed delivery valve or stuck non-return valve blocks flow. Fix: Check all valves are open and working.

9. Excessive Suction Lift or Head

The pump is being asked to lift higher than its rating allows. Fix: Verify the pump is correctly sized for your head requirement.

If you have checked these and the pump still will not deliver, bring it in or call us — our team diagnoses pump faults every day. Contact us or send a pump inquiry for free sizing guidance.