Pipe Repair & Replacement — Copper, PEX, Galvanized & PVC

Delex Plumbing repairs and replaces pipes throughout Mississauga — pinhole leaks, burst sections, corroded galvanized supply lines, and full home repiping to PEX. Licensed, insured, flat-rate pricing, same-day emergency response available.

Pinhole Leak Repair — Copper Supply Pipes

Pinhole leaks in copper supply pipes are the most common pipe repair call in Mississauga homes built between 1960 and 1990. Peel Region’s water supply has a calcium carbonate hardness of 18 to 20 grains per gallon — one of the highest concentrations in Ontario — which accelerates the electrochemical corrosion that causes pinhole failures in copper pipe. A single pinhole leak releases approximately 20 litres of water per day when the supply is pressurized. After 60 days undetected, that is 1,200 litres absorbed into wall framing, insulation, and drywall.

We repair pinhole leaks using one of three methods depending on the pipe location, accessibility, and surrounding condition. Solder patch repair uses a copper patch soldered over the pinhole on an accessible pipe in a dry environment. Compression coupling repair uses a push-to-connect or mechanical compression fitting to bridge the leaking section without soldering — appropriate for wet environments or locations where open flame is restricted. Section replacement cuts out the defective pipe length and installs a new copper section with two end couplings.

When we find a single pinhole leak, we inspect the surrounding pipe run for additional corrosion pits before recommending a repair scope. A pipe with one confirmed pinhole and three additional corrosion pits in the same 600mm section is a candidate for section replacement rather than a single pinhole patch. Patching one pinhole while leaving three additional failures imminent produces a return call within weeks.

Pipe location determines the repair approach and cost. An accessible pinhole on an exposed basement supply pipe takes 30 to 45 minutes to repair. A pinhole inside a finished wall requires opening the wall, drying the cavity if wet, making the repair, and either closing the wall or leaving an access panel — a scope of work that takes 2 to 4 hours depending on the wall construction.

Galvanized Pipe Replacement — Repiping to PEX

Galvanized steel supply pipes were standard in Canadian home construction through the mid-1970s. Galvanized pipe has a design life of 40 to 50 years under normal service conditions — but Mississauga’s hard water accelerates internal corrosion, and many galvanized systems in the city are operating well past their design life. The characteristic symptom is progressive low water pressure as the internal corrosion products narrow the effective bore diameter. A galvanized pipe that is more than 50% occluded by internal corrosion scale cannot be economically restored — replacement is the correct decision.

Full galvanized supply replacement involves removing all galvanized distribution piping from the main shut-off to the fixture rough-in points and installing a new PEX distribution system with a manifold at the mechanical room. PEX (cross-linked polyethylene) is the current standard for residential supply distribution: it is flexible enough to route through walls without elbows, resistant to freeze-burst failure, and has a manufacturer-rated service life exceeding 50 years.

We design the PEX manifold layout during the pre-repair site visit, confirming the manifold location, the supply routing path to each fixture group, and the isolation valve configuration. Individual circuit shutoffs at the manifold allow any fixture to be isolated for service without shutting off the rest of the house — a significant practical improvement over the zone valve configuration typical of galvanized systems.

Full galvanized repiping for a standard Mississauga detached home (3 bathrooms, kitchen, laundry) takes two to three days. We restore water service each evening by connecting temporary supply to the kitchen and at least one bathroom before the full repipe is complete. The City of Mississauga plumbing permit for a full repipe is obtained before work begins and the inspection is coordinated to occur before any walls are closed.

Burst Pipe Emergency Repair

A burst supply pipe releases water continuously at full supply pressure — typically 50 to 80 PSI in Mississauga — until the main water supply is turned off. The first action when a pipe bursts is to close the main shut-off valve, which is typically located near the foundation wall in the basement where the water service line enters from the street. If the main shut-off valve cannot be located or is seized, call 416-910-2550 immediately — our dispatcher can walk you through the shut-off procedure while the plumber is en route.

We respond to burst pipe emergencies 24 hours a day, seven days a week, with an average 45-minute response time across Mississauga. For burst pipes in finished walls or ceilings, we cut the minimum access needed to reach the pipe, make the repair, and advise on drying and restoration before closing the access. We do not close drywall over a wet cavity — the area must be confirmed dry before any restoration work proceeds.

Burst pipe repair pipes in copper pipe uses soldered end couplings or push-to-connect SharkBite fittings depending on the site conditions. Push-to-connect fittings are appropriate for emergency repairs where pipe drying is difficult — they can be installed on damp pipe and provide an immediate watertight connection without open flame. For permanent repairs in accessible locations, soldered connections are preferred for their proven 50-year track record in residential plumbing.

PVC & ABS Drain Pipe Repair

PVC and ABS drain pipe repair addresses cracks, broken fittings, separated joints, and sections damaged during renovation work. Drain pipes operate without pressure, making temporary repairs practical in some situations — but a cracked drain pipe that runs intermittently wet can cause significant structural damage over time if the leak is minor enough to go unnoticed.

We repair PVC drain pipes using solvent-welded slip couplings for accessible sections and rubber Fernco-style mechanical couplings for sections where solvent welding is not practical. For ABS drain pipes — common in Mississauga homes built between 1970 and 1985 — we use ABS solvent cement for new connections and transition fittings where ABS and PVC connect in the same drain system.

If a pipe repair also reveals low supply pressure throughout the house, see our low water pressure diagnosis service — we handle both on the same visit. For drain pipes that have collapsed or developed significant lateral displacement, replacement is required. We identify the extent of replacement required during the diagnostic inspection and provide a fixed-price repair scope before any work begins.

Licensed Pipe Repair — Mississauga & GTA

All Delex Plumbing pipe repair and replacement work is performed by Ontario College of Trades licensed master plumbers. We carry full liability insurance, bonded coverage, and WSIB on every job. Every pipe repair includes a written labour warranty — if a repair we performed fails within the warranty period, we return and fix it at no charge.

We serve all Mississauga neighbourhoods — Port Credit, Meadowvale, Erin Mills, Streetsville, City Centre, Cooksville, Clarkson, Malton, Lorne Park, and Mineola. If you also need frozen or burst pipe service, we handle that on the same visit. For a leaking pipe call 416-910-2550 or request service online. For a scheduled residential plumbing consultation, same-day and next-day appointments are available most days.

Free Estimate — Call 416-910-2550

Every pipe repair starts with a free estimate. Call 416-910-2550, contact us online, or request service for same-day booking.

Frequently Asked Questions

Q: How much does pipe repair cost in Mississauga?

A: Pinhole copper pipe repair costs $150 to $350 depending on accessibility and repair method. Burst pipe emergency repair costs $250 to $600. Full galvanized repipe for a 3-bathroom home costs $8,000 to $18,000. All prices are flat-rate with no surprise charges. Call 416-910-2550 for a free estimate.

Q: How do I know if I have a pinhole pipe leak?

A: Signs of a pinhole pipe leak include: unexplained increase in your water bill, water staining on ceilings or drywall, musty odour in wall cavities, reduced water pressure at fixtures, and the sound of running water when all fixtures are off. Confirm with the low-flow indicator on your water meter — if it moves with all fixtures off, water is leaking somewhere in the system.

Q: Should I repair or replace galvanized pipes?

A: If your galvanized supply system has one or two localized leaks and acceptable water pressure, targeted repair is reasonable. If pressure is consistently low across multiple fixtures, if you have had three or more galvanized leaks in 5 years, or if the pipes are visibly orange-brown inside when cut, full replacement to PEX is the more economical long-term choice. We provide an honest assessment during the diagnostic visit.

Q: How long does pipe repiping take in a Mississauga home?

A: A full galvanized-to-PEX repipe for a standard 3-bathroom Mississauga detached home takes 2 to 3 days. We restore water service each evening before leaving. The City of Mississauga plumbing inspection is typically scheduled for the second day, allowing us to complete the connection to fixtures before the end of the project.

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