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Sink Plumbing — Repair, Replacement & Leak Service
Delex Plumbing handles all sink plumbing in Mississauga — kitchen sinks, bathroom sinks, utility sinks, faucet repair, drain assembly replacement, under-sink leaks, and full sink installation. Licensed, insured, same-day service available.
Sink Repair — Faucets, Drains & Under-Sink Leaks
Sink problems range from minor nuisances to active water damage situations. A dripping faucet is an annoyance and a water waster. A leaking P-trap soaks the cabinet interior and creates mold conditions over time. A burst supply line under a kitchen sink can release litres of water per minute onto the cabinet floor, subfloor, and surrounding cabinetry.
Under-sink water leaks are among the most common causes of undetected water damage in Mississauga homes. Homeowners who keep cleaning supplies and bins inside the under-sink cabinet often do not open the cabinet doors for weeks — giving a slow P-trap leak or supply line seep time to saturate the cabinet bottom, warp the MDF base, and begin mould growth. We recommend inspecting the under-sink cabinet visually at least monthly.
Corrosion on the interior surfaces of supply valves is a reliable indicator of long-term slow leakage at the supply connection. When we find mineral staining or greenish corrosion on supply valves during a service call, we replace the affected valve and supply line as part of the same job. These components cost less than $30 in parts and take 20 minutes to replace, but provide the homeowner insurance-compliant isolation capability in any future emergency.
Kitchen Sink Replacement & Installation
Kitchen sink replacement involves disconnecting the drain, supply lines, and garbage disposal; removing the old sink; and installing the new one with all new supply lines, a fresh P-trap assembly, and proper drain strainer sealing. For undermount sinks in granite or quartz countertops, we use silicone adhesive per the countertop manufacturer’s specifications.
We install all sink configurations: drop-in, undermount, apron-front (farmhouse), and single or double bowl. We confirm material compatibility between the sink and countertop before beginning installation to avoid warranty issues.
Bathroom Sink & Vanity Plumbing
Bathroom plumbing vanity sinks require specific supply line configurations depending on whether the vanity has one or two sinks, whether the faucet is a centerset or widespread configuration, and the clearance available inside the vanity cabinet. We handle all configurations and carry a full range of supply lines and P-trap assemblies on our service vehicles.
For floating wall-mount sinks, the supply connections are in the wall rather than under the vanity. We handle supply valve relocation and drain rough-in for floating sink installations as part of bathroom renovation work.
Faucet Repair & Replacement
Faucet repair typically involves cartridge or O-ring replacement. We carry Moen, Delta, Kohler, and American Standard cartridges and handle single-handle, dual-handle, and widespread faucet configurations. When a faucet is beyond economical repair — usually after 15 or more years with multiple previous cartridge replacements — we recommend replacement and can install a new unit in the same visit for most standard configurations.
Outdoor faucet replacement is another common sink-adjacent service call. Frost-free sillcocks that have developed internal leaks or drip after freezing are replaced with new frost-free units soldered to the supply line inside the wall. We also install outdoor faucet lock covers and anti-siphon devices required by Ontario Building Code.
Clogged Sink Drains
Slow or clogged sink drains in kitchens are primarily caused by grease and food particle accumulation inside the drain pipe. Bathroom sink drains clog from hair and soap buildup. We clear both with drain cleaning; for severe grease blockages in kitchen drains, hydro jetting restores the full bore and prevents recurrence for significantly longer than snaking alone.
Sink Plumbing Service — Mississauga
We provide sink plumbing services across all Mississauga neighbourhoods as part of our residential plumbing offering. Call 416-910-2550 for same-day service or a free estimate.
Utility Sink & Laundry Tub Installation
Utility sinks and laundry tubs in basements and utility rooms are among the most useful plumbing additions a Mississauga homeowner can make. A utility sink provides a dedicated location for hand washing before entering the house from the garage, cleaning paint rollers and brushes, and soaking heavily soiled laundry — tasks that should not be performed in kitchen or bathroom sinks. We install sump pumps and freestanding laundry tubs and wall-mount utility sinks with matching supply and drain connections.
The supply connection for a utility sink taps into the nearest hot and cold supply lines, typically from the water heater and the main supply manifold in the utility room. The drain connection routes to the nearest floor drain or laundry standpipe, following the correct slope requirements for drain pipe under Ontario Building Code. We obtain the necessary plumbing permit for any new drain connection and schedule the required inspection.
For basement utility sinks installed at or near the slab level, we assess whether gravity drainage is possible to a floor drain or whether an above-floor pump unit (like a Liberty Ascent drain pump) is required to lift the drain to the building drain level. Above-floor pumps are a clean solution for sinks in finished basements where cutting the slab for a new drain is not practical or desirable.
Bar Sink & Island Plumbing
Kitchen island sinks and bar sinks present unique plumbing challenges because they are located away from the perimeter walls where supply and drain lines naturally run. The supply lines typically route under the floor to the island location. The drain is the more complex part — an island sink drain requires an island loop vent configuration under the floor, since a standard vertical vent to the roof is not possible through an island cabinet.
We design and install island sink plumbing using an island loop vent that rises as high as possible under the countertop before looping back down to connect to the building drain below the floor. This configuration satisfies the venting requirement without penetrating the ceiling above the island. The installation requires cutting into the subfloor and concrete if necessary for the drain routing.
Bar sink installations in home bars and entertainment areas typically include a small single-bowl sink, a simple hot and cold supply connection, and a direct drain to the nearest stack or floor drain. For home bars in finished basements where slab cutting is not an option, a compact lift pump handles the drain lift to the building drain level.
Same-Day Service — Mississauga's Most Responsive Plumbing Team
Same-day plumbing service in Mississauga is available when you call before 10 a.m. on weekdays. We confirm a two-hour arrival window during your call and send a text notification when the plumber is 30 minutes away. If any scheduling change affects your window, our dispatcher calls you proactively — we do not leave clients waiting without information.
Our service vehicles are stocked with the 50 most commonly needed repair parts and materials. For the majority of Mississauga residential plumbing calls, this means the repair is completed on the first visit without a parts run to the supplier. On the rare occasion where a specialized part is required, we have established same-day supplier relationships and can typically complete the repair the same day in most cases.
Evening and weekend appointments are available for non-emergency work by advance booking. We schedule these appointments at the same flat-rate pricing as weekday service — no premium for Saturday or early evening availability. For clients who cannot take time off work for a plumbing appointment, we provide the weekday scheduling flexibility that makes routine service accessible without using vacation time.
Our service area covers every Mississauga postal code, from L4T in Malton to L5J in Clarkson, and from L5A in Cooksville to L5B in the Square One district. We do not charge additional fees for properties at the outer boundaries of our service area — Mississauga is our home territory and all points within it receive the same response standard.
Why Mississauga Homeowners Choose Delex Plumbing
Delex Plumbing has built its reputation across Mississauga through 10 years of consistent service — same-day response, flat-rate pricing with no surprise charges, and licensed master plumbers on every job. Our 384 verified five-star Google reviews reflect the cumulative experience of homeowners from Port Credit to Meadowvale who called us once for a routine repair and have called back for every plumbing need since.
The three things our clients most consistently cite in their reviews: we arrived when we said we would, the invoice matched the quote, and the plumber left the work area clean. These are not exceptional standards — they are baseline professional standards that should characterize every service business. We treat them as the floor rather than the ceiling of what our service delivers.
Our flat-rate pricing policy means the quote we provide before touching anything is the amount on your invoice when we leave. No overtime charges for after-hours calls. No travel fees for distances within our service area. No material markups disclosed after the job is done. Transparent pricing is how we have maintained a 5.0-star rating across 384 reviews — clients who receive exactly what they were quoted do not leave one-star reviews.
We back every job with a written labour warranty. If something we installed or repaired fails within the warranty period, we return and fix it at no charge. No runaround, no dispute about scope. The warranty documentation is included with the invoice and specifies the exact duration and scope of coverage. For fixture and material warranties from manufacturers, we register the installation and provide the registration confirmation so warranty claims go smoothly without paperwork obstacles.
Licensed & Insured — Sink Plumbing by Certified Professionals
Every plumber on the Delex team holds a valid Certificate of Qualification from the Ontario College of Trades. This licence is not a formality — it is the legal prerequisite for performing plumbing work in Ontario, and it represents a minimum of 9,000 hours of apprenticeship training plus a journeyman examination that tests both technical knowledge and code compliance.
Full liability insurance protects your property if any accidental damage occurs during our work. Bonded coverage protects you from any dishonesty by our employees while on your property. WSIB coverage protects you from any liability if a worker is injured on your property. These are not optional additions to our service — they are standard protections that every legitimate plumbing company carries and that unlicensed operators routinely lack.
We pull permits for all work that requires them. Ontario Building Code requires permits for new plumbing installations, changes to drain and vent systems, and water heater replacements. A job done without a required permit leaves you without a legally completed installation — a disclosure obligation in real estate transactions and a potential coverage issue in insurance claims. Our permit fees are included in the project quote rather than added as a surprise at the end.
Frequently Asked Questions About Emergency Plumbing
Q: What causes water to leak under my kitchen sink?
A: The three most common sources are: the P-trap connection (loose slip joint or cracked trap), the drain strainer seal (worn plumber’s putty between the strainer body and sink), and the supply line connections (braided hose that has aged or was overtightened). We identify the exact source before recommending a repair.
Q: How much does faucet replacement cost in Mississauga?
A: Faucet installation (supply-your-own faucet) runs $120 to $250 for a standard kitchen or bathroom configuration. Supply-and-install pricing depends on the faucet model selected. Call 416-910-2550 for a free estimate.
Q: Can I install a new kitchen sink myself?
A: The sink mounting can be done by a homeowner, but Ontario Building Code requires a licensed plumber to connect the water supply valves and drain to the new sink. Improper connections are the leading cause of under-sink water damage claims.
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Or Give Us A Call: 416-910-2550
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100% Quality Work Free Estimates — Call 416-910-2550
Every sink plumbing job starts with a free estimate. Call 416-910-2550, contact us online, or request service — for same-day service.
