Trust Guard Security Scanned
hours left for
same day shipping
hours left for
same day shipping
Loading...
per page
Set Descending Direction
  1. Hunter Pump Start Relay | PSR-22
    Hunter Pump Start Relay | PSR-22
    On-Sale $89.83 List Price $146.52
    HLSG SKU: HTRPSR22
    SKU: PSR-22
  2. Irritrol Pump Start Relay | SR-1
    Irritrol Pump Start Relay | SR-1
    On-Sale $131.48 List Price $165.95
    HLSG SKU: IRRSR1
    SKU: SR-1
  3. K-Rain 24V Coil Pump Start Relay | 1522
    K-Rain 24V Coil Pump Start Relay | 1522
    On-Sale $70.80 List Price $94.95
    HLSG SKU: KRM1522
    SKU: 1522
  4. Munro SmartBox Pump Start Relay with Motor Overheat Protection | MPLC2410
    Munro SmartBox Pump Start Relay with Motor Overheat Protection | MPLC2410
    On-Sale $790.36 List Price $1,148.95
    HLSG SKU: MUNMPLC2410T
    SKU: MPLC2410
  5. Hunter Pump Start Relay | PSR-52
    Hunter Pump Start Relay | PSR-52
    On-Sale $140.84 List Price $229.96
    HLSG SKU: HTRPSR52
    SKU: PSR-52
  6. Munro StartBox 24 Volt Pump Start Relay | MPSR24
    Munro StartBox 24 Volt Pump Start Relay | MPSR24
    On-Sale $107.10 List Price $126.00
    HLSG SKU: MUNMPSR24
    SKU: MPSR24
  7. Munro SmartBox Pump Start Relay with Pressure Sensor | MPLC24
    Munro SmartBox Pump Start Relay with Pressure Sensor | MPLC24
    On-Sale $505.75 List Price $595.00
    HLSG SKU: MUNPLC24V
    SKU: MPLC24
  8. Munro SmartBox Pump Start Relay with Pressure and Temp Sensors | MPLC24T
    Munro SmartBox Pump Start Relay with Pressure and Temp Sensors | MPLC24T
    On-Sale $573.75 List Price $675.00
    HLSG SKU: MUNMPLC24T
    SKU: MPLC24T
  9. Munro SmartBox Pump Start Relay with Motor Overheat Protection | MPLC243
    Munro SmartBox Pump Start Relay with Motor Overheat Protection | MPLC243
    On-Sale $620.27 List Price $895.95
    SKU: MPLC243
  10. Rain Pro 2 HP Pump Start Relay | PS-200
    Rain Pro 2 HP Pump Start Relay | PS-200
    On-Sale $71.13 List Price $141.95
    HLSG SKU: HITPS200
    SKU: PS-200
  11. K-Rain 220 VAC 2HP 1-Zone Sprinkler Timer International Use Only | 2120
    K-Rain 220 VAC 2HP 1-Zone Sprinkler Timer International Use Only | 2120
    On-Sale $131.18 List Price $194.95
    HLSG SKU: KRM2120
    SKU: 2120
  12. Hunter Pump Start Relay | PSR-53
    Hunter Pump Start Relay | PSR-53
    On-Sale $253.01 List Price $413.11
    HLSG SKU: HTRPSR53
    SKU: PSR-53
  13. Munro SmartBox Pump Start Relay with Motor Overheat Protection | MPLC245
    Munro SmartBox Pump Start Relay with Motor Overheat Protection | MPLC245T
    On-Sale $1,009.80 List Price $1,188.00
    HLSG SKU: MUNMPLC245T
    SKU: MPLC245T
  14. Munro Pump Start Relay for 1 Float Rainwater Harvesting System | MBRB241
    Munro Pump Start Relay for 1 Float Rainwater Harvesting System | MBRB241
    On-Sale $969.85 List Price $1,141.00
    HLSG SKU: MUNMBRB241
    SKU: MBRB241
  15. Munro Pump Start Relay for 2 Float Rainwater Harvesting System | MBRB242
    Munro Pump Start Relay for 2 Float Rainwater Harvesting System | MBRB242
    On-Sale $1,018.30 List Price $1,198.00
    HLSG SKU: MUNMBRB242
    SKU: MBRB242
per page
Set Descending Direction

How Does a Pump Start Relay Work?

If you're using a non-pressurized water source such as a well, pond, or reservoir for your irrigation system, a sprinkler pump and a pump relay will be necessary. The pump start relay connects to both the irrigation controller and the pump. When your controller signals a zone to start watering your grass or garden, it sends a signal to the relay, which then turns on the pump. The pump remains active until the irrigation controller sends another signal to end the watering cycle, causing the relay to turn off the pump. 

 

Pump Start Relay FAQs

Do all irrigation systems need a pump start relay?

No, only irrigation systems that draw water from non-pressurized sources require a sprinkler pump start relay. If you have a system that uses municipal water pressure, you do not need a pump start relay, as the system operates on water supplied by the local utility. These systems already provide the necessary pressure for the irrigation system.

How do I install a pump start relay?

Installing a pump start relay typically requires wiring the relay to both the irrigation controller and the water pump. If you are experienced with electrical work and familiar with irrigation systems, you may be able to install the relay yourself. However, because the relay involves high-voltage components, it is generally safer to hire a professional to ensure that it is correctly installed and wired.

What causes an irrigation pump relay to fail?

The most common causes of pump start relay failure are similar to other errors you might see with complex electrical setups. Sudden surges in electrical current and short circuits are both possible. Over time, the electrical contacts inside the relay can also wear out due to frequent cycling of the pump. Inspect the relay and associated wiring periodically to ensure there are no signs of wear, corrosion, or overheating.