Don't Forget the Septic Pump: The Forgotten Load in a Well-Water Outage Plan
Last verified: September 2026
Most outage planning is about the water coming in — but if your home has a septic pump, the power going out can cause a backup at the other end. This guide helps you find out whether you have one, conserve what goes down the drain, and include the pump in your generator plan. Rather have a hand? My number is (330) 200-8042.
The Septic Pump in an Outage, at a Glance
Not every septic system needs power — the simplest run on gravity alone — but many rural systems have a pump that does: effluent and lift pumps, grinder pumps, and aerobic treatment units with aerators. If yours has a pump and the power goes out, wastewater collects in the pump tank, and in a long outage or with heavy use it can eventually back up. You can tell you have one by an outdoor control panel or a high-water alarm near the tank. The fixes are simple: conserve what goes down the drain during an outage, and include the septic pump as one of your generator circuits so a short run draws the tank back down. It is the most-forgotten piece of a well-water plan. There is a printable page-by-page version up top.
Common Questions
1 Will my septic back up if the power goes out?
Only if your system has a pump and the outage is long enough, or your water use heavy enough, to fill the pump tank. Gravity systems are unaffected. Conserving and running the pump on a generator prevent it.
2 How do I know if I have a septic pump?
Look for an outdoor control panel or a high-water alarm box near the tank, an air blower for an aerobic unit, or a mound drain field. Your septic company can confirm from their records.
3 Can I run my septic pump on my generator?
Yes — it can be one of your transfer switch or interlock circuits, often a modest 120-volt load. A short run during a generator session draws the tank back down.
4 What should I do if the high-water alarm goes off in an outage?
Stop sending water down the drain and run the pump on your generator to draw the tank down. Never just silence it — it means the tank is filling.
5 What is a grinder pump, and does it change things?
A grinder pump grinds and lifts wastewater where gravity can't. Homes with one depend on it entirely, so prioritize it on your generator and conserve hard during an outage.
6 Does an aerobic system need special planning?
Yes — its aerator runs on power, and a long outage can set the treatment back. Ask your septic pro how long yours can go without power and whether to prioritize its blower.
Would You Rather I Just Help?
The septic pump is the piece almost everyone forgets in a well-water outage plan, and it is exactly the kind of thing I like to catch for folks. I will help you find out whether you have one, include it in your generator circuits, understand your high-water alarm, and coordinate your electrician and septic pro. A first visit is a flat $99, with a 30-day come-back-free guarantee.
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).