Interlock Kit for Sump-Pump Backup
Last verified: September 2026
The storms that flood your basement are often the ones that cut your power — so your sump pump can fail right when you need it. Here's how an interlock keeps it running, in layers. Questions? (330) 200-8042.
Sump-Pump Backup, at a Glance
A sump pump keeps your basement dry — but it runs on electricity, and the heavy storms that flood are often the ones that knock out power. An interlock reaches the sump's circuit from your own panel, so you switch it back on with a breaker, even when it's hardwired. Add a battery-backup pump for instant, unattended protection, and let the generator run the main pump for the long haul. There's a printable 29-page version up top.
Common Questions
1 Why does my sump pump need backup power?
Because the heavy storms that flood basements are often the same ones that knock out power — so your pump can lose power right when it's needed most.
2 How does an interlock power the sump pump?
It brings your whole panel onto generator power, so you switch on the sump's breaker with your regular breakers. It reaches a hardwired sump circuit just fine, which a cord can't always do.
3 Do I still need a battery backup if I have an interlock?
It's a great complement. A battery backup responds instantly and unattended — covering the first minutes and any time you're away — while the generator runs the main pump for the long haul.
4 Will the sump pump overload my generator?
It's usually a modest load, but it surges each time it starts and fires on its own. Leave headroom so it can kick on without warning — our sizing guide covers the method.
5 Why does my pump run fine but the basement floods in winter?
The discharge pipe may be frozen, so the pump has nowhere to send water. Keep the discharge clear and freeze-protected — a plumbing task worth doing before winter.
6 What if my basement floods with the power on?
Never wade into standing water that may contact outlets, cords, or the panel — it can be deadly. If you can't safely cut the power from a dry spot, stay out and call a professional.
Would You Rather I Just Help?
Keeping a basement dry through the worst storms is worth getting right. I'll help you plan layered protection — the interlock, a battery backup, and good habits — size the sump in, and coordinate a licensed electrician and a plumber. $99 flat for a visit.
Would you rather I just do this for you?
No shame in it — plenty of folks would rather hand it off, and that's what I'm here for. I'll come to your home, set it up right, and make sure it's working before I leave. Flat $99 per visit — no jargon, no upsell, and every visit is 30-day come-back-free.
Not a hardware job? I can often fix it remotely for $49 — a secure screen-share, up to 2 hours, that you watch the whole time and can end whenever (included free for $39/mo Support Plan members, and it counts toward the $99 if it turns out I need to come out).