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You are here: Home > Lawn Irrigation > Sprinkler Pumps > Pump Start Relays

Pump Start Relays

Sprinkler Warehouse® carries a large selection of 24 VAC pump start relays. Manufacturers included Hunter, K-Rain and Munro.

Browse our extensive and ever growing line of pump start relays today!

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K-Rain 1522 - 3HP at 110/220V with 24V Coil Pump Start Relay
K-Rain 1522 24V Coil Pump Start Relay
  • Industrial-grade enclosure
  • 110V/220V input
  • 24V output

Our Price: $42.00
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Irritrol SR-1 - Pump Start Relay
Irritrol SR-1 Pump Start Relay
  • Initiate pump or control transformers for landscape lighting
  • Compatible with Irritrol PC Control System
  • Can be mounted  indoor or outdoor

Our Price: $55.30
Sale Price: $46.20
You save $9.10!
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Munro MPSR24 StartBox 24 VAC Pump Start Relay
Munro MPSR24 StartBox 24 Volt Pump Start Relay
  • For all single phase 3/4 HP - 5 HP pumps
  • 110-220 Line Voltage
  • Use with 24V sprinkler system controller

Our Price: $53.04
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PSR-22 - Pump Start Relay
Hunter PSR-22 Pump Start Relay
  • 24VAC flying leads for easy connection
  • 110V/240V output (2 HP at 110V, 5 HP at 240VAC)
  • 24V input

Our Price: $57.00
Sale Price: $53.76
You save $3.24!
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PSR-52 - Pump Start Relay
Hunter PSR-52 Pump Start Relay
  • 24VAC flying leads for easy connection
  • 110V/240V output (5 HP at 110V, 7.5 HP at 240VAC)
  • 24V input

Our Price: $72.26
Sale Price: $70.13
You save $2.13!
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PSR-53 - Pump Start Relay
Hunter PSR-53 Pump Start Relay
  • 24VAC flying leads for easy connection
  • 5 HP at 110V (single phase), 7.5 HP at 240V (single phase), 10 HP at 240V (3 phase)
  • 24V input

Our Price: $134.08
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Munro MPLC24 SmartBox Pump Start Relay For 24V Sprinkler Timer
Munro MPLC24 SmartBox Pump Start Relay with Pressure Sensor
  • For all single phase 3/4 HP to 7-1/2 HP pumps
  • For 24 volt timers
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off

Our Price: $405.85
Sale Price: $220.88
You save $184.97!
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Munro MPLC24T SmartBox Pump Start Relay With Dead Head Protection
Munro MPLC24T SmartBox Pump Start Relay With Pressure and Temp Sensors
  • For all single phase 3/4 HP to 7-1/2 HP pumps
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off
  • Added feature of automatic shut-down if water temperatures hit 105° - protects pump from Dead Head damage

Our Price: $375.00
Sale Price: $245.88
You save $129.12!
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Munro MPLC24T-G SmartBox Pump Start Relay- Pressure Sensor
  • For all single phase 3/4 HP to 7-1/2 HP pumps
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off
  • Added feature of automatic shut-down if water temperatures hit 105° - protects pump from Dead Head damage

Our Price: $375.00
Sale Price: $245.88
You save $129.12!
Qty Add
Munro MPLC243 SmartBox Pump Start Relay With Motor Overheat Protection
Munro MPLC243 SmartBox Pump Start Relay With Motor Overheat Protection
  • For all single phase 3 HP pumps
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off
  • Added feature of automatic thermal overload protection - shuts pump down if it starts pulling too many amps

Our Price: $565.00
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Munro MPLC245 SmartBox Pump Start Relay With Motor Overheat Protection
Munro MPLC245 SmartBox Pump Start Relay With Motor Overheat Protection
  • For all single phase 5 HP pumps
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off
  • Added feature of automatic thermal overload protection - shuts pump down if it starts pulling too many amps

Our Price: $565.00
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Munro MBRB241 Pump Start Relay for 1 Float Rainwater Harvesting System
Munro MBRB241 Pump Start Relay for 1 Float Rainwater Harvesting System
  • Use with 3/4 HP to 5 HP single-phase pump
  • Includes automatic thermal overload and low pressure shut-off
  • Float control allows it to connect to a rainwater collecting system

Our Price: $599.95
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Munro MBRB242 Pump Start Relay for 2 Float Rainwater Harvesting System
Munro MBRB242 Pump Start Relay for 2 Float Rainwater Harvesting System
  • Use with 3/4 HP to 5 HP single-phase pump
  • Includes automatic thermal overload and low pressure shut-off
  • Float control allows it to connect to a rainwater collecting system

Our Price: $795.00
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Munro MPLC2410 SmartBox Motor Overheat Protection Pump Start Relay
Munro MPLC2410 SmartBox Motor Overheat Protection Pump Start Relay
  • For all single phase 10 HP pumps
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off
  • Added feature of automatic thermal overload protection - shuts pump down if it starts pulling too many amps

Our Price: $795.00
Qty Add
Munro MPLC2475 SmartBox Motor Overheat Protection Pump Start Relay
Munro MPLC2475 SmartBox Motor Overheat Protection Pump Start Relay
  • For all single phase 7-1/2 HP pumps
  • Pressure sensor shuts pump down when pressure drops too low
  • Automatic, adjustable timer re-starts pump after low pressure shut-off
  • Added feature of automatic thermal overload protection - shuts pump down if it starts pulling too many amps

Our Price: $795.00
Qty Add
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What is a Pump Start Relay?

What is a Pump Start Relay?

Pumps - Parts and Components

A pump start relay is an electrical device that allows your irrigation timer to communicate with the pump. This device is imperative when you are using a pump to supply water to your irrigation system. Pumps are built to use normal house currents; the relay changes the irrigation timer to normal household voltage. Pump start relays must be mounted at a minimum of 15 feet from the timer and pump to avoid electrical interferences that cause malfunctions.

When a pump is to be operated by the controller, a pump start relay must be used.

To connect the pump start relay:

  1. Route a wire pair from the pump relay into the controller housing.
  2. Connect a common wire to the terminal slot C (Common) and the remaining wire from the pump relay to the P/MV screw slot.

WARNING: Do not connect the controller directly to the pump. The controller will be damaged.

How to Wire a Pump Start Relay

How to Wire a Pump Start Relay

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