Troubleshooting Common Issues with Irrigation Pumps and Valves

Irrigation systems play a crucial role in maintaining healthy landscapes, gardens, and crops by providing the right amount of water at the right time. However, when pump and valve components fail or malfunction, they can lead to inefficient irrigation, water waste, and even plant damage. This article will discuss common issues with irrigation pumps and valves, along with troubleshooting steps and maintenance tips to ensure optimal system performance.

High angle of delicate baby plant growing from soil and irrigating from watering can on sunny day

Irrigation Pump Problems

Irrigation pumps are responsible for drawing water from a source and delivering it to the irrigation system’s mainline. Common problems include low pressure, reduced flow, and frequent on/off cycling.

Low pressure in your irrigation pump can lead to insufficient water supply for your irrigation system, which may result in your landscapes or farms not getting enough water. Reduced flow, similarly, can affect the efficiency of the irrigation system, leading to potential water wastage or inadequate watering. Frequent on/off cycling can be a symptom of a malfunctioning pump switch or pressure tank, which could potentially lead to higher energy consumption and wear and tear of your pump.

This table and each row represents a common problem with irrigation pumps, its description, possible causes, and suggested solutions.

Possible Causes
Suggested Solutions
Low Pressure
The pump is not able to generate the required pressure to deliver water to the irrigation system.
Worn out parts, clogged filters, air leaks, low water level in source.
Replace worn out parts, clean filters, check for leaks, ensure sufficient water supply in source.
Reduced Flow
The amount of water the pump is able to move has decreased.
Impeller damage, clogged pipe, pump running at low speed.
Replace damaged impeller, clean pipe, adjust pump speed.
Frequent On/Off Cycling
The pump frequently turns on and off in a short period of time.
Incorrect pump sizing, faulty pressure switch, leak in the system.
Ensure correct pump size for system, replace pressure switch, check for leaks.

Low Pressure

  • Check the pump’s suction line for leaks or blockages.
  • Examine the foot valve for debris or damage, and ensure it is properly primed.
  • Inspect the impeller for wear, corrosion, or blockages.
  • Verify that the discharge line is not restricted or kinked.

Reduced Flow

  • Inspect the intake screen for blockages or damage, and clean or replace as needed.
  • Assess the impeller for wear, corrosion, or blockages, and replace if necessary.
  • Check the discharge line for restrictions, leaks, or blockages.
  • Ensure the pump is rated for the correct flow rate for your irrigation system.

Frequent On/Off Cycling

  • Confirm the pressure control setting matches the system requirements.
  • Examine the foot valve for leaks, and replace if necessary.
  • Inspect the check valve for proper operation and placement.
  • Verify the system demand does not exceed the pump’s capacity.

Irrigation Valve Issues

Valves regulate water flow and pressure within irrigation systems. Common valve issues include leaks, stuck open or closed positions, and inconsistent operation.

Understanding these common valve issues can significantly improve the efficiency and longevity of your irrigation system. A leak is a common valve issue that results in excess water usage and increased bills. It can occur due to wear and tear, improper installation, or damage to the valve system.

Stuck valves, either in an open or closed position, can disrupt the water flow in your irrigation system. If a valve is stuck open, it results in constant water flow, leading to overwatering. On the other hand, a valve stuck in the closed position hampers water supply, causing under-watering or no watering at all.

Inconsistent operation refers to the irregular performance of the valve, where it does not open or close when it should. This can be caused by electrical issues, a faulty solenoid (an electromagnetic device that controls the flow and pressure of water), or debris within the valve.


  • Check the valve body, solenoid, and diaphragm for signs of wear, cracks, or damage.
  • Examine the O-rings and gaskets for deterioration, and replace as needed.
  • Ensure the valve is properly installed and sealed to prevent leaks.

Stuck Open or Closed

  • Inspect the valve for debris or blockages, and clean as necessary.
  • Verify the solenoid is functioning correctly and providing adequate power.
  • Check the diaphragm for tears or damage, and replace if necessary.
  • Examine the flow control for proper adjustment and operation.

Inconsistent Operation

  • Ensure the valve is correctly sized for the system’s flow rate and pressure requirements.
  • Inspect the electrical connections for corrosion, damage, or loose wiring.
  • Verify the controller is programmed correctly and providing the correct signal to the valve.
  • Check the backflow preventer for proper operation and installation.

Preventive Maintenance Tips

Regular maintenance can help prevent many common irrigation pump and valve issues:

Common Issues
Preventive Maintenance
Pump Overheating
Regular cleaning and lubrication
Prevents damage to the pump’s motor
Valve Leakage
Periodic checks and replacement of worn-out seals
Prevents water wastage and damage to the premises
Decreased Pump Pressure
Scheduled inspections for any blockages or damaged parts
Ensures efficient water delivery
Valve Failure
Regular checks for any mechanical or electrical faults
Prevents complete system shutdown
Corrosion and Rust
Regular application of anti-rust and anti-corrosion solutions
Prolongs the life of the pump and valves
  • Clean or replace filters and strainers regularly.
  • Lubricate mechanical components as recommended by the manufacturer.
  • Inspect and tighten all electrical connections.
  • Test the system during off-peak hours to identify any issues early.
  • Schedule annual professional maintenance to ensure optimal system performance.


By understanding common issues with irrigation pumps and valves and following the troubleshooting steps outlined in this article, you can maintain a reliable and efficient irrigation system. Regular preventive maintenance and prompt attention to issues will help extend the life of your system components and ensure your landscape remains healthy and vibrant.