Why a Relay Exists
Controllers output low-voltage signals; pumps need high-voltage contactors. A pump start relay bridges that gap safely.
Wiring Discipline
Follow the pump and controller manuals exactly. Label commons, MV, and pump terminals to avoid cross-talk during service.
Safety Hardware
Lockable disconnects, proper grounding, and strain relief on flex protect technicians and homeowners.
Troubleshooting
If the pump hums but does not spin, verify contactor pull-in and supply voltage before replacing random parts.
Frequently Asked Questions
Can one relay run a booster and irrigation?
Only if rated and wired per engineer-approved diagrams—do not guess.
Why does my pump short-cycle?
Check pressure tank, leaks, and relay chatter—not just the relay.
