[{"@context":"https:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/www.selectplumbingandheating.ca\/sump-pump-running-constantly\/#BlogPosting","mainEntityOfPage":"https:\/\/www.selectplumbingandheating.ca\/sump-pump-running-constantly\/","headline":"Why Is My Sump Pump Running Constantly? GTA Homeowner\u2019s Guide","name":"Why Is My Sump Pump Running Constantly? GTA Homeowner\u2019s Guide","description":"Contents hide TLDR: The Quick Answer Understanding the \u201cConstant Run\u201d Phenomenon in Ontario Common Causes of Continuous Sump Pump Operation 1. The Stuck Float Switch: The #1 Culprit 2. The \u201cInfinite Loop\u201d: Check Valve Failure 3. Blocked or Frozen Discharge Lines Information Gain: The City of Toronto Basement Flooding Subsidy GTA Soil Conditions and Hydrostatic […]","datePublished":"2026-07-13","dateModified":"2026-07-13","author":{"@type":"Person","@id":"https:\/\/www.selectplumbingandheating.ca\/author\/selectplumbing\/#Person","name":"selectplumbing","url":"https:\/\/www.selectplumbingandheating.ca\/author\/selectplumbing\/","identifier":4,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/cc7bffde386eed43f0b0970803e7825d32990994406af11fa12404e45aee2c0e?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/cc7bffde386eed43f0b0970803e7825d32990994406af11fa12404e45aee2c0e?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Select Plumbing and Heating"},"image":{"@type":"ImageObject","@id":"https:\/\/www.selectplumbingandheating.ca\/wp-content\/uploads\/2016\/03\/sump-pump-backup-systems.jpg","url":"https:\/\/www.selectplumbingandheating.ca\/wp-content\/uploads\/2016\/03\/sump-pump-backup-systems.jpg","height":270,"width":360},"url":"https:\/\/www.selectplumbingandheating.ca\/sump-pump-running-constantly\/","about":["Uncategorized"],"wordCount":1936,"articleBody":"            Contents                                    hide                                                TLDR: The Quick Answer                            Understanding the \u201cConstant Run\u201d Phenomenon in Ontario                            Common Causes of Continuous Sump Pump Operation                            1. The Stuck Float Switch: The #1 Culprit                            2. The \u201cInfinite Loop\u201d: Check Valve Failure                            3. Blocked or Frozen Discharge Lines                            Information Gain: The City of Toronto Basement Flooding Subsidy                            GTA Soil Conditions and Hydrostatic Pressure                            The Impact of Urbanization on GTA Water Tables                            Sump Pump Maintenance Checklist for GTA Homeowners                            When to Call Select Plumbing                            Frequently Asked Questions (FAQs)                            1. Why is my sump pump running when it hasn\u2019t rained?                            2. Can a sump pump burn out from running too much?                            3. How long should a sump pump last in Toronto?                            4. Is it normal for my sump pump to run every 30 seconds?                            5. Does the City of Toronto offer a rebate for sump pump repairs?                            Protect Your Basement with Anta Plumbing                            Related posts:        TLDR: The Quick AnswerIf your sump pump is running constantly, it is likely due to a stuck float switch, a failed check valve, or a blocked discharge line. In the Greater Toronto Area, heavy clay soil and seasonal freeze-thaw cycles often force pumps to work harder. While frequent cycling during a spring thaw is normal, a pump that never stops will eventually overheat and fail. Action: Check the float switch for debris first; if the pit is empty but the pump is still humming, unplug it and call a licensed plumber immediately to prevent motor burnout.Understanding the \u201cConstant Run\u201d Phenomenon in OntarioFor homeowners in Toronto, Etobicoke, and across the GTA, the sump pump is the unsung hero of the basement. However, when that familiar hum becomes a permanent background noise, it is a signal that your flood protection system is under extreme stress.A sump pump is designed for intermittent use. It should activate when water in the basin reaches a certain level and deactivate once that water has been discharged. When it runs nonstop, it is not just wasting electricity\u2014it is rapidly approaching a mechanical breakdown.Common Causes of Continuous Sump Pump OperationThe following table outlines the most frequent culprits behind a runaway pump and how they typically manifest in local homes.CauseSymptomSeverityStuck Float SwitchPump runs even when the pit is completely dry.High (Motor burnout risk)Failed Check ValvePump shuts off, then restarts seconds later as water flows back.Medium (Wastes energy\/wear)Blocked Discharge LinePump runs but water level in the pit does not drop.High (Flood risk)Undersized PumpPump runs nonstop during heavy rain but can\u2019t keep up.Medium (Inefficient)High Water TableContinuous flow into the pit regardless of weather.Low (Environmental)1. The Stuck Float Switch: The #1 CulpritThe float switch is a buoyant device that acts as the \u201con\/off\u201d trigger for your pump. In many GTA basements, vibrations from the pump can cause it to \u201cwander\u201d within the pit. If the float becomes wedged against the basin wall or tangled in the power cord, it stays in the \u201cup\u201d position, keeping the pump engaged indefinitely.The GTA Factor: Our region\u2019s hard water can lead to mineral scale buildup on the switch mechanism, making it less responsive and more prone to sticking.2. The \u201cInfinite Loop\u201d: Check Valve FailureThe check valve is a small but critical component installed on the discharge pipe. Its job is to ensure that once water is pumped out, it cannot flow back into the pit.If the check valve fails or is missing, the water remaining in the vertical pipe (often 8\u201310 feet high) rushes back into the basin the moment the pump stops. This immediately raises the float switch, triggering the pump again. This \u201cshort-cycling\u201d can happen every 30 seconds, leading to premature motor failure.3. Blocked or Frozen Discharge LinesIn Ontario, our winters are notorious for the \u201cfreeze-thaw\u201d cycle. If your discharge pipe is not angled correctly or is blocked by ice, the pump will push against a solid wall of obstruction. It will run continuously, unable to move the water, until the thermal overload protection kicks in\u2014or the motor burns out.Information Gain: The City of Toronto Basement Flooding SubsidyMany articles focus solely on the mechanics, but for GTA residents, there is a financial layer to this issue. As of May 1, 2026, the City of Toronto has expanded its Basement Flooding Protection Subsidy Program.\u2022Sump Pump Subsidy: You may be eligible for a subsidy of 80% of the invoiced cost, up to a maximum of $1,750 (including labor and materials).\u2022Backup Power: The city also offers up to $300 for a permanently connected battery backup for your sump pump.\u2022Total Protection: Combined with backwater valve subsidies, homeowners can access up to $6,650 in total funding to protect their properties.Pro Tip: To qualify for the rebate, the work MUST be performed by a licensed plumber with a valid City of Toronto business license. Anta Plumbing is fully licensed and can assist with the necessary documentation.GTA Soil Conditions and Hydrostatic PressureThe Greater Toronto Area sits on a foundation of heavy clay soil, particularly in areas like Mississauga, Brampton, and parts of North York. Unlike sandy soil, which allows water to drain quickly, clay acts like a sponge, retaining moisture for long periods and expanding as it becomes saturated. This creates immense hydrostatic pressure\u2014the force exerted by standing water\u2014against your foundation walls and basement floor.During a typical spring thaw in Scarborough or Etobicoke, the combination of melting snow and seasonal rainfall leads to a rapid rise in the local water table. If your sump pump is running constantly during this window, it is likely responding to the high volume of water being collected by your weeping tiles (the perforated pipes around your foundation). However, if the pump continues to cycle frequently long after the surface ground has dried, it could indicate a deeper issue. For instance, a hidden plumbing leak, such as a cracked main water service line or a compromised sewer lateral, could be continuously feeding water into your sump basin. In such cases, the pump is merely treating the symptom of a much larger problem that could eventually lead to foundation heaving or structural cracks.The Impact of Urbanization on GTA Water TablesAs the GTA continues to grow, increased \u201cimpermeable surfaces\u201d\u2014like paved driveways and large patios\u2014mean that rainwater has fewer places to soak into the ground naturally. Instead, it is funneled toward residential foundations. This urban runoff often overwhelms older municipal storm sewers, causing water to back up into private properties. This is why having a properly sized and functioning sump pump is no longer just a \u201cnice-to-have\u201d feature for Toronto homeowners; it is a critical line of defense against the changing local climate and urban landscape.Sump Pump Maintenance Checklist for GTA HomeownersTo prevent emergency failures, follow this seasonal maintenance schedule:1.The Bucket Test (Every 3 Months): Pour at least 20 litres (about 5 gallons) of water into the pit. Observe the vertical float or tethered switch to ensure it rises freely without catching on the basin walls. The pump should engage smoothly and evacuate the water within seconds.2.Clear the Intake Screen and Impeller: Over time, the bottom of your sump pit can accumulate \u201cfines\u201d\u2014tiny particles of silt and gravel. These can clog the intake screen at the base of the pump. Periodically disconnect the power and clear away any debris to ensure the impeller can spin at maximum efficiency.3.Inspect the Discharge Outlet and Air Gap: Trace your discharge pipe to where it exits the house. Ensure the water is directed at least 3 metres (10 feet) away from the foundation, preferably toward a French drain or a lower part of the yard. In the winter, ensure there is an air gap or a \u201cfreeze guard\u201d (like the IceGuard system) to allow water to escape even if the main line is frozen solid.4.Test the Battery Backup System: If you have a backup pump, unplug the primary pump and repeat the bucket test. The backup should trigger immediately. Check the battery terminals for corrosion and ensure the \u201cstatus\u201d light on the controller is green. Most deep-cycle batteries used in these systems need replacement every 3 to 5 years.5.Listen for the \u201cCheck Valve Hammer\u201d: A healthy check valve makes a distinct \u201cclunk\u201d or \u201cthump\u201d sound when the pump cycles off. This is the sound of the internal flapper closing to prevent backflow. If you hear a loud, metallic banging, you may need a \u201cquiet check valve\u201d to prevent water hammer, which can eventually crack PVC joints.When to Call Select PlumbingWhile a stuck float can sometimes be fixed with a quick adjustment, most \u201cconstant run\u201d issues require professional intervention. If you notice any of the following, it is time to call in the experts:\u2022The pump is hot to the touch or smells like burning plastic.\u2022There are strange grinding or rattling noises coming from the pit.\u2022The pump is running, but the water level is rising.\u2022Your basement has a persistent damp or musty odor.Frequently Asked Questions (FAQs)1. Why is my sump pump running when it hasn\u2019t rained?This is often caused by a high groundwater table or a stuck float switch. In the GTA, clay soil can hold water for days after a storm, keeping the pump active. However, it could also indicate a leaking water main or a broken underground sprinkler line near your foundation.2. Can a sump pump burn out from running too much?Yes. Sump pumps are designed for intermittent operation. Running continuously causes the motor to overheat, which can melt internal seals and lead to total mechanical failure. If your pump has been running for more than 6 hours without a break, it is at high risk of burnout.3. How long should a sump pump last in Toronto?On average, a high-quality sump pump in the GTA lasts 7 to 10 years. Factors like the frequency of use (high in flood-prone areas like Etobicoke) and the presence of mineral-heavy water can shorten this lifespan. Regular maintenance can extend it toward the 10-year mark.4. Is it normal for my sump pump to run every 30 seconds?No, this is known as short-cycling. It is usually caused by a failed check valve allowing water to flow back into the pit or a sump basin that is too small for the volume of water entering. This puts extreme strain on the motor and should be repaired immediately.5. Does the City of Toronto offer a rebate for sump pump repairs?The City of Toronto provides subsidies for the installation of new sump pumps and backup systems, but typically not for basic repairs. However, if your current pump is failing, replacing it with a new, eligible system through the Basement Flooding Protection Subsidy Program can save you up to $1,750.Protect Your Basement with Anta PlumbingDon\u2019t wait for a flooded basement to take action. If your sump pump is acting up, the team at Select Plumbing is here to help. Serving Toronto and the entire GTA for over 25 years, we specialize in sump pump installation, maintenance, and emergency repairs. We are fully licensed to help you qualify for the City of Toronto Basement Flooding Protection Subsidy.Contact or visit us online at https:\/\/www.selectplumbingandheating.ca\/ to schedule your inspection!Related posts:Why Is My Toilet Constantly Running? Fixes & CausesHow to Thaw Frozen Pipes in the GTA: A Homeowner\u2019s GuideIndustrial Pump Repair in Mississauga & GTA: Booster, Circulation, Ejector & Sump PumpsSump Pump Maintenance \u2013 Importance, Tips & Best PracticesSump Pump Not Working? Common Problems & Their FixesWhy Is My Water Heater Leaking? Causes & FixesBackflow Assembly Installation Requirements \u2013 Guide + ChecklistWhy Proper Compressed Air Piping System Installation Is Essential?"},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Why Is My Sump Pump Running Constantly? 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