Re-piping a Niagara Home: Galvanized vs PEX vs Copper

Niagara has a lot of older housing stock — century homes in St. Catharines and Niagara-on-the-Lake, post-war builds in Welland and Port Colborne, 1960s and 70s subdivisions throughout the region. Many of these homes still have their original galvanized steel supply pipes, and those pipes are living on borrowed time.

Signs you need to repipe

• Low water pressure throughout the house — not just at one fixture.
• Rusty or brown-tinted water, especially first thing in the morning.
• Frequent pinhole leaks or burst pipes.
• Water that tastes metallic.
• Visible corrosion or mineral buildup on exposed pipes.
• Your home was built before 1970 and you've never replaced the supply lines.

Understanding your pipe options

Galvanized steel — the old standard

Galvanized steel was the go-to supply pipe material from the early 1900s through the 1960s. It's zinc-coated steel, which provides corrosion resistance — but only for so long. After 40–70 years, the zinc coating fails, the interior rusts, and mineral deposits narrow the pipe bore significantly. Low pressure, rusty water, and leaks are the result. If you have galvanized, it needs to come out.

Copper — the long-term standard

Copper became the dominant supply pipe material after World War II and remains excellent. It's durable (50–70 year lifespan), biologically inert, resistant to corrosion, and compatible with Niagara's hard water. The downside: cost. Copper is significantly more expensive than PEX, both in materials and labour (it requires soldering). In Niagara's hard water environment, copper can experience accelerated pitting corrosion — a good plumber will account for this in the installation.

PEX — the modern choice

Cross-linked polyethylene (PEX) tubing has largely replaced copper for new residential work and repiping over the last 15 years. It's flexible (reducing the number of fittings needed), freeze-resistant, immune to corrosion, and significantly less expensive than copper. PEX can be run in long continuous runs from a central manifold to each fixture — called a home-run system — which virtually eliminates in-wall joints and the leaks they cause. Lifespan is estimated at 50+ years. This is what we use for most repiping projects in Niagara.

Cost comparison (Niagara averages)

• Copper repipe (average 3-bed home): $12,000–$18,000 supplied and installed.
• PEX repipe (average 3-bed home): $7,000–$12,000 supplied and installed.
• Partial repipe (one floor or one branch): $2,500–$5,000.
• Costs vary based on home size, number of fixtures, and access complexity.

What the process looks like

A full repipe typically takes 2–3 days for an average home. We work room by room, cutting small access holes in walls and ceilings where needed to run new pipe. New shutoff valves are installed at every fixture. Once the new pipe is in and tested, we patch the drywall (or leave it for your drywaller — your call). Water is only off for a few hours during the final connection and pressure test.

Get a repipe quote

If you're dealing with any of the symptoms above, the sooner you address it the better — a failed galvanized pipe inside a wall causes far more damage than the repipe itself. Ottr Plumr provides free repipe assessments across the Niagara Region. Call 289-488-1007.