Protect Your Irrigation Pump: Hunter PSR-22 Double-Pole Pump Start Relay
The Hunter PSR-22 is a double-pole/single-throw pump start relay that safely bridges 24 VAC controller output to high-voltage pump circuits. It is an essential component for any irrigation system that draws water from a well, creek, pond, or uses a booster pump — protecting both equipment and users from dangerous line voltage at the controller.
Key Specifications & Features
- SKU: PSR-22 (also: PSR22)
- Configuration: Double-pole, single-throw (DPST)
- Control Input: 24 VAC (from controller pump start terminal)
- Primary Power: 120 VAC or 240 VAC
- HP at 120 VAC: Up to 2 HP
- HP at 240 VAC: Up to 3 HP
- Max Full Load Amps: 30A
- Coil VA Inrush: 30 VA (1.25A)
- Coil VA Holding: 6.5 VA (0.27A)
- Enclosure: Lockable NEMA-rated weatherproof housing
- Lead Wires: 24 VAC flying leads for easy controller connection
- Certifications: UL, cUL, FCC, CE, RCM
- Warranty: 2 years
Frequently Asked Questions
Why do I need a pump start relay?
Irrigation controllers only output 24 VAC at low current. Pumps run on 120V or 240V line voltage which would instantly destroy a controller if wired directly. The relay acts as a safe, electrically isolated switch between the controller signal and the pump circuit.
Is this relay compatible with all irrigation controllers?
Yes. Any controller with a pump start or master valve terminal (24 VAC output) will work — Hunter, Rain Bird, Orbit, Toro, Rachio, and all other brands.
What is the difference between PSR-22 and PSR-52 or PSR-53?
The PSR-22 handles pumps up to 2HP at 120V and 3HP at 240V with double poles. The PSR-52 handles up to 3HP at 120V and 7.5HP at 240V. The PSR-53 is triple-pole and adds three-phase support for up to 10HP three-phase applications.
