Whole-home repiping replaces a house’s supply lines end to end, from the main shutoff to every fixture. In West Michigan the usual reason is galvanized steel pipe that has reached the end of a 60–80 year service life, with polybutylene a distant second in homes built in the late 1970s through the mid-1990s. Most two- and three-bath homes in the Grand Rapids area land between $5,000 and $12,000 for a PEX repipe, with copper running meaningfully higher and small or very large homes falling outside that band — the cost table below breaks it out. Plan on 2–5 working days, and expect an immediate difference in water pressure, water clarity and the end of recurring pipe failures.
If you read our earlier piece on how Michigan’s aging infrastructure affects your home’s plumbing, you already have the context: West Michigan has a large stock of pre-1970 homes still running on their original galvanized steel supply pipe. This post is the practical follow-through — what a repipe actually involves, when it is clearly the right call, and how to plan for it.
When Is Repiping Necessary? The Clear Signs
Some situations point unambiguously to a repipe rather than another spot repair.
🔴 Indicators that repiping is the right solution. Multiple pinhole leaks or pipe failures inside a 12-month window — each repair is a preview of the next one nearby. Water pressure that is low throughout the house and has not responded to fixture-level fixes. Rusty, discolored or metallic-tasting water that persists after water heater maintenance. Galvanized supply pipe throughout a home more than 50 years old. Polybutylene supply pipe, common in homes built between roughly 1978 and 1995, which fails at the fittings without much warning. A home inspection report that flags the supply piping as a significant concern. A refinance, sale or home equity application, where lenders and buyers increasingly look closely at old galvanized pipe.
🤔 When spot repair is still the right answer. A single isolated failure in an otherwise sound copper or PEX system does not call for a repipe. In a home with mixed materials — some copper, some galvanized — replacing only the galvanized runs is often the better economics. We assess each house on its own and recommend the scope that makes sense, not the largest one.
Low pressure specifically has several possible causes, and not all of them are the pipe. If that is your main symptom, it is worth ruling out the cheaper explanations first — our guides on hard water damage and tracking down a hidden leak cover two of the most common.
Pipe Material Options for Repiping in Michigan
Two materials account for nearly all residential repiping in West Michigan.
🟠 Copper — the traditional standard. Copper has been the reference material for residential supply lines since the 1960s: durable, biologically inert, heat-resistant and understood by every plumber and inspector in the state. It costs more per foot than PEX and needs a soldered joint at every fitting, which makes installation more labor-intensive. It performs well in West Michigan’s hard water, though very acidic water can produce pinhole leaks over decades. Copper is the choice when pipe will be visible in a finished space, or when a lender or local requirement specifies it.
🔵 PEX — the modern alternative. Cross-linked polyethylene tubing has become the dominant repiping material nationally. It is flexible, so it routes through walls with far fewer openings; it expands rather than splitting if it freezes; it does not corrode and resists scale adhesion; and it installs faster than copper, which brings labor cost down. PEX is approved for residential supply systems under the Michigan Plumbing Code, and both common connection systems — crimp and expansion — give reliable long-term joints. It is the material we recommend for most Michigan repipes.
| Category | Copper | PEX |
|---|---|---|
| Material cost | Higher per foot | Lower per foot |
| Labor cost | Higher — every joint is soldered | Lower — crimp or expansion joints are faster |
| Freeze behavior | Cracks when frozen | Expands and recovers |
| Expected life | 50+ years with good water quality | 50+ years; warranty terms vary by brand |
| Hard water performance | Good; scale can build inside over decades | Excellent; smooth bore resists scale |
| Appearance | Preferred where pipe stays visible | Usually concealed in walls |
| Michigan code | Approved for all residential applications | Approved for all residential applications |
What a Repiping Project Involves
A whole-home repipe is the largest plumbing project most homeowners will take on in a house they already live in. Knowing the sequence takes most of the anxiety out of it.
- Day 1 — assessment and permit. We walk the home, document every fixture, plan the pipe routing through the structure and pull the plumbing permit from your municipality. The state’s plumbing permit page explains why the permit and inspection exist.
- Days 1–2 — rough-in. New supply lines run from the main shutoff to every fixture location. A PEX repipe needs small access openings to thread the tubing; copper needs more wall access because the pipe is rigid.
- Days 2–3 — fixture tie-in. Every fixture is reconnected — toilets, sinks, showers, tubs, dishwasher, washing machine, water heater and outdoor faucets — and a new shutoff valve goes in at each one as part of the job.
- Day 3 — pressure test. The new system is pressurized and tested for leaks before anything is closed up.
- Day 4 — rough-in inspection. The municipal inspector signs off on the new work before walls are repaired.
- Days 4–5 — patching. We patch and close the access openings and tape them ready for paint. Painting and finish work is the homeowner’s to arrange.
Water to the house is shut off during each working day and restored at the end of it. Most households stay in the home through the project with some inconvenience. On a larger home running the full 4–5 days, some homeowners choose to stay elsewhere.
What Does Repiping Cost in Michigan? (2026)
Cost is driven by three things: the number of fixtures and the square footage, the material, and how much access the house gives us — a basement with exposed joists is a very different job from slab-on-grade with every wall finished.
| Home size / scope | PEX repipe (installed) | Copper repipe (installed) |
|---|---|---|
| Small home (under 1,200 sq ft, 1 bath) | $3,500 – $6,000 | $4,500 – $8,000 |
| Medium home (1,200–2,000 sq ft, 2 bath) | $5,000 – $8,000 | $6,500 – $11,000 |
| Larger home (2,000–3,000 sq ft, 2–3 bath) | $7,000 – $12,000 | $9,000 – $15,000 |
| Large home (3,000+ sq ft, 3+ baths) | $10,000 – $18,000 | $12,000 – $22,000 |
| Partial repipe (one zone or floor) | $1,500 – $4,500 | $2,000 – $5,500 |
These are planning ranges for the West Michigan market, not quotes, and they assume normal access — a basement with exposed joists and some unfinished wall. Homes with every wall finished and no basement access cost more because of the additional drywall work. Kenowa Plumbing gives you a written, itemized quote after a site assessment. Book an assessment or call (616) 538-5929.
What Changes After Repiping
✅ What repiped homeowners notice first. Water pressure that is clearly stronger — often dramatically so where galvanized corrosion had narrowed the bore to a fraction of its original diameter. Hot water that arrives faster and holds temperature. Water that runs clear rather than rust-tinged. No more pinhole leaks and emergency repair calls. A supply system that is new, permitted and documented.
On resale, the honest version of the benefit is this: original galvanized supply pipe is one of the most common objections buyers and their inspectors raise on a pre-1970 West Michigan home, and it is a recurring source of lender and insurer questions. A completed, permitted repipe removes that objection and gives you documentation to disclose. Whether it changes your sale price depends on your market and your buyer — but it takes a negotiating liability off the table. If you are on the buying side instead, our guide to what to look for before you close covers how to spot the problem during inspection.
Two related notes worth knowing. Repiping replaces the supply lines inside your home; it does not replace the water service line running from the street to your house. If lead is your concern rather than galvanized steel, Grand Rapids publishes a searchable lead water service line map so you can check your own address. And if your water quality concerns go beyond the pipe, our whole-home water filtration guide covers what filtration does and does not solve.
Frequently Asked Questions
Most homeowners stay, with some inconvenience — water is restored each evening. If the job involves extensive drywall work, or you have young children or anyone in the house who needs consistent access to water, a short stay elsewhere during the 3–5 working days is a reasonable choice. We go through the logistics with you at planning.
No. A standard repipe covers the supply lines, hot and cold. Drain and waste lines are a separate system and are not included unless we are addressing a specific drain problem at the same time. If your home also has aging cast iron drain pipe, we can assess both and talk through whether doing them together makes sense.
The access openings need patching and painting. We close them cleanly and tape the patches ready for paint; the painting itself is yours to arrange or contract separately. How many openings there are depends on the material — PEX needs fewer and smaller ones than copper — and on how much of the plumbing is already exposed.
Look at the exposed supply pipe near your water heater or main shutoff. Galvanized steel is dull grey, threaded at the joints and magnetic. Copper is unmistakable. Polybutylene is grey, blue or black flexible plastic with crimped fittings. If you are unsure, send us a photo or have us look during a service call.
