Sump Pump Installation in Mississauga, ON | OCM Excavation

OCM Excavation installs sump pump systems for homeowners across Mississauga, ON. Lakefront neighbourhoods from Port Credit to Lakeview sit on a high water table — the ground stays saturated for weeks at a time. That’s why a Mississauga sump system needs a real primary pump, a battery backup, and a discharge line that gets water far away from the foundation. Most projects run $2,200 to $5,500. The City of Mississauga prohibits sump-to-sanitary connections, and we know exactly how to keep your install on the right side of the rule. Call 416-317-3090.

How a Sump Pump System Works

Four working parts. A perforated polyethylene pit sits flush in the basement floor, fed by weeping tile and below-slab drainage. When groundwater hits a set level inside the pit, a float switch fires the primary pump. The pump pushes water up through a check valve and out a PVC discharge line, dropping it at least 10 feet from your foundation. The check valve is what prevents water from falling back into the pit after each cycle — without it, the pump short-cycles to death, often within a year on a Mississauga lakefront lot.

The Four Components We Install

Sump pit: 18-24 gallon perforated polyethylene basin, set flush into the slab and bedded in clean gravel.
Primary pump: 1/3 to 1/2 hp submersible cast-iron pump, moving 30-50 gallons per minute. On lakefront Mississauga lots we lean toward 1/2 hp.
Battery backup pump: 12V DC pump on a sealed deep-cycle marine battery, 8-12 hours of runtime through a power outage.
Discharge line: 1.5″-2″ PVC pipe running 10+ feet from the foundation to a splash block, swale, or storm sewer per City of Mississauga drainage rules.

Mississauga’s Sanitary Sewer Rule

The City of Mississauga, like Toronto, prohibits connecting sump pump discharge to the sanitary sewer. The reason is the same: during heavy rain events sump water overwhelms the sanitary system, causing sewer backups in neighbouring basements. Mississauga has a Foundation Drainage Subsidy Program that pays homeowners to disconnect downspouts and sump discharge from the sanitary sewer. We’ve completed dozens of these conversions across Mississauga from Streetsville to Clarkson. When you call 416-317-3090, we’ll tell you whether your property qualifies for the rebate.

When Mississauga Homeowners Call Us

Lakefront Mississauga basement with persistent dampness or visible water marks.
Existing pump is over 10 years old and the basement is finished.
Pre-sale inspection flagged a failed pump or no battery backup.
Just had foundation waterproofing done and need a working pit for interior drainage.
Insurance company wants battery backup before renewing the home policy.

Our Process in Mississauga

First visit: site assessment. We look at the existing pit, where water enters, electrical panel access, and where the discharge can safely terminate. If we’re cutting a new pit, the slab gets scored with a concrete saw, the concrete and soil come out to 30-36 inches, the new pit gets bedded in clean gravel, and the slab gets patched flush. Plumbing the pump, check valve, and PVC discharge takes a few more hours. For long exterior trench runs across Mississauga’s larger lakefront lots, we bring our Yanmar SV40 mini excavator and trench through the yard with minimal lawn damage.

Timeline and Cost

Pump replacement in an existing Mississauga pit: 1 day, $2,200-$3,200. New pit cut into existing slab with full primary + battery backup: 1-2 days, $3,500-$4,500. Pit, pumps, and long exterior discharge trenching combined: 2-4 days, $4,500-$5,500. Every Mississauga quote is fixed and written before the first cut.

Related Services in Mississauga

A sump system is one defence — there should be others. Pair the pump with foundation waterproofing in Mississauga and a properly sized French drain so the pit isn’t fighting a losing battle. For basement window leaks, see window well installation. Need work in a neighbouring city? Check our Toronto sump pump page or browse all OCM service areas across the GTA.

Frequently Asked Questions

Can my sump pump connect to the Mississauga sanitary sewer?

No. The City of Mississauga prohibits sump pump discharge into the sanitary sewer. Discharge has to go to surface drainage — a splash block, swale, or rear yard — or, where permitted, to the storm sewer. The City offers a rebate to homeowners disconnecting from the sanitary sewer.

Do I need a permit for a sump pump in Mississauga?

Replacing a pump in an existing pit generally does not require a permit in Mississauga. Cutting a new pit into your slab or installing a new exterior discharge line tied to municipal storm infrastructure may need a permit. We check with the City before starting work.

Why is battery backup critical in Mississauga?

Lakefront Mississauga sees lake-effect storms that knock out power exactly when the pump needs to run hardest. A 12V DC backup pump on a sealed marine battery runs 8-12 hours, keeping the basement dry until the grid recovers. Without it, one outage can flood a finished basement.

How long do sump pumps last in Mississauga?

A quality cast-iron submersible pump lasts roughly 10 years. Lakefront homes near Port Credit and Clarkson see pumps wear faster because they cycle more often. Backup batteries need replacement every 5 years to maintain full runtime.

Get a Quote

Call OCM Excavation at 416-317-3090 or fill out our Mississauga quote form. Free assessment, fixed written price, work guaranteed.

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