Hamilton, Burlington, and Stoney Creek basements flood during summer thunderstorms more often than most homeowners realize. The pattern is consistent: the rain hits, the power goes out for an hour or two, and the sump pit fills. By the time power comes back, the carpet is wet at the edges and the drywall is wicking. A battery backup sump pump system - properly installed with a dedicated electrical circuit and a real alarm - prevents almost all of it. Here is what a good install looks like and what the electrical scope is.
What a real sump pump backup system actually is
The hardware comes in a few flavours:
- Primary AC pump only. What most homes have. A single 1/3 or 1/2 HP submersible pump plugged into an outlet or hardwired to a switched circuit. Works perfectly until the power goes out.
- Primary AC pump plus 12V DC battery backup pump. A second submersible pump in the same pit, fed from a battery and battery charger system. When AC power is lost, the DC pump kicks in. Typical battery is a deep-cycle marine 12V; runtime is 4 to 8 hours of intermittent pumping depending on the cycle.
- Primary AC pump plus water-powered backup. Driven by the home's mains water pressure. No battery to maintain. Works when the power is out and the water is on. Not common in Ontario - municipal water pressure varies and the system is less efficient on water usage.
- Generator-backed primary pump. If the home has a standby generator with the sump on a backed-up circuit, the primary AC pump just keeps running through the outage. Often the right answer at homes that already have a generator.
For most Hamilton and Burlington basements without a generator, the right answer is the primary AC pump plus DC battery backup combination, paired with a high-water alarm.
The electrical scope - more than "plug it in"
The OESC and the manufacturer's instructions converge on a few specifics that most homeowners and a fair number of plumbers get wrong:
- Dedicated 15A or 20A branch circuit for the primary sump pump. Not shared with the laundry receptacle, not shared with the freezer outlet. A dedicated circuit so one tripped breaker affects only the sump.
- GFCI protection appropriate to the location. Required in unfinished basements where the pump receptacle is within reach of damp areas. Note: some submersible pump manufacturers explicitly do not recommend GFCI on the pump circuit because of nuisance trips. Read the pump's instructions and follow them - if the manufacturer says no GFCI, the installer must use a single-receptacle non-GFCI outlet labelled as such, and the OESC accepts the exception.
- Battery backup system on its own AC feed. The DC pump's battery charger needs AC power continuously to keep the battery topped up. We typically wire this on the same circuit as the primary, or on its own circuit if the primary has GFCI exceptions that complicate it.
- High-water alarm. Audible, separately powered (battery or 9V plus AC trickle charger), positioned at the homeowner's living area. If the primary fails and the backup is running, the homeowner should hear an alarm well before water reaches the basement floor.
- Float switch wiring done right. The float switch is the most common point of failure on a sump pump. Tethered floats wear over time; the cheaper vertical floats on lower-end pumps fail sooner. Mounted clear of the pit wall so it can swing freely.
What we install
For a typical Hamilton or Burlington basement with no existing backup:
- New dedicated 15A or 20A circuit from the panel to the sump pit area
- Single-receptacle outlet at the pit, mounted on the joist or wall above the pit (not in the pit)
- If GFCI is appropriate per manufacturer: GFCI receptacle. If not: a labelled non-GFCI single receptacle.
- A battery backup system (we tend toward Liberty Pumps, Zoeller, or Wayne for Canadian installs - all have established service networks)
- High-water alarm at the joist level near the pit, with the alarm horn relocated to a hallway or living-area junction so it is audible
- Optional: a leak detection sensor at the slab level outside the pit, tied to the same alarm
The job is typically a half-day on site once the pump system is delivered. ESA permit if the new circuit triggers it (usually yes for a new dedicated circuit).
What the alarm actually buys you
The single most useful thing a sump pump backup system has is a working high-water alarm. The math: in a Hamilton or Burlington basement during a storm, if the pump fails silently, water can rise 6 to 12 inches in the pit and then start flowing onto the slab in a couple of hours. If the homeowner hears the alarm at the 6-inch mark, they have time to call a plumber, set up a portable pump, or at minimum move stored items off the floor. Without the alarm, the first sign is wet carpet.
The alarm needs to be loud enough to wake the homeowner at 3am and located somewhere they can actually hear. An audible chirp in the basement utility room while the family sleeps two floors up is useless.
Pairing with a smart home leak detector
For homes with a smart-home setup or just a smartphone owner, a wifi-connected sump pit monitor (Levoit, YoLink, the Liberty Pumps NightEye built-in) sends an alert to the phone when water level exceeds setpoint or when AC power is lost. Useful when you are at the cottage and the Hamilton basement is the one filling. We wire the monitor's AC trickle on the same dedicated circuit so the install is integrated.
The mistakes we replace
- Sump pump on the laundry circuit. Dryer trips the breaker, sump is dead. Common in older homes.
- Pump plugged into an extension cord routed up to a kitchen outlet. Failure mode: someone trips the extension cord and the pump is silently dead for weeks.
- Battery backup without a working battery. Lead-acid batteries on chargers fail in 3 to 5 years. The backup never gets tested, the battery is dead, the homeowner finds out during a storm.
- Float switch jammed against the pit wall. Either physically wedged, or the cord coiled in a way that prevents the float from swinging. The pump never kicks on.
- Discharge line frozen in winter. Not strictly electrical, but related - the pump runs continuously into a blocked discharge, the motor overheats, the thermal trips, and now both your AC pump and your battery backup are dead.
When to call us
If your Hamilton basement has flooded once already, or you are heading into a wet summer with a single AC pump and no alarm, this is a one-day project that pays for itself the first time the power goes out during a storm. We do these across Hamilton, Burlington, Stoney Creek, Waterdown, and Ancaster as routine residential electrical. Request a quote with a photo of the panel and the pit area.