Partial or Full Poly-B Repipe? How Kelowna Homeowners Should Decide
Once a Kelowna homeowner accepts that the grey pipe has to go, a second question turns up almost immediately. Does all of it have to go.
It is a fair question. A partial repipe can cost half of a full one. The honest answer is that a partial is the right call in a narrow set of situations and the wrong call in most, and the deciding factor is usually not plumbing at all.
What each one actually means
A full repipe replaces every potable water line in the house, hot and cold, from the main shut off out to every fixture. New PEX, new fittings, new shut off valves at each fixture, pressure tested, with the accessible old pipe removed. When it is finished there is no Poly-B left carrying water anywhere in the house.
A partial repipe replaces the runs that can be reached without major demolition, usually everything visible in a crawlspace, an unfinished basement ceiling or an accessible attic, plus the drops at whatever fixtures get opened. Lines buried inside finished walls and ceilings stay where they are.
The important part is what a partial leaves behind. It is not a lesser version of the same result. It is a different result: a house that still has Poly-B in it, just less of it, in the places that are hardest to get at if one of them fails.
The insurance test, which decides most cases
For most Kelowna homeowners the reason this project exists at all is the insurance policy. A surcharge, a water damage exclusion, a reduced limit, a replace by date, or an outright decline on a new policy.
If that is your situation, the test is simple and it is not a plumbing question.
Ask your broker, in writing, what they will accept as proof of remediation. Not over the phone. In an email you can keep.
Most insurers that care about Poly-B want it gone, not reduced. A completion letter that says "all accessible Poly-B replaced, some remains in walls" is a very different document from one that says "all Poly-B potable water piping removed and replaced with PEX", and underwriters read the difference. If your insurer wants the second letter, a partial repipe does not get you there, no matter how much of the house it covers.
Doing the job in two stages costs meaningfully more than doing it once. Repeated setup, repeated water shut downs, repeated drywall work, and a second round of protection and cleanup. The most expensive version of this project is the one you pay for twice.
When a partial genuinely makes sense
There are real cases. They are specific.
A renovation is already coming. If the main floor bathroom and kitchen are being gutted within the next year or two, doing the accessible runs now and finishing the rest when the walls are open is efficient rather than wasteful. The walls open once and you pay for drywall once.
The remaining run is short, visible and accessible. A single length crossing an open crawlspace, in view, on cold water, that could be replaced in an hour if it ever needed to be, is a genuinely different risk profile from a line buried above a finished basement ceiling.
You are selling in the near term and the buyer knows. A partial that is fully and honestly disclosed, priced into the sale, is a legitimate commercial decision between two informed parties. What it is not is a way to make a listing photograph better while leaving a problem for someone who does not know.
Budget is genuinely the constraint and the alternative is nothing. Replacing the hot water runs, which degrade fastest, is better than another five years of doing nothing. Go in knowing your insurer probably will not credit it, and treat it as risk reduction rather than resolution.
When it does not make sense
When your insurance is the reason. Covered above, and it is the majority of cases.
When the house is on a slab or has finished ceilings throughout. These are exactly the homes where a partial leaves the highest risk pipe in the least accessible place. A failure inside a finished ceiling is the expensive kind.
When the quote is vague about what stays. If a company cannot tell you specifically which runs remain Poly-B and where they are, you are not being sold a partial repipe, you are being sold an unknown. Ask for it in writing, room by room.
When the price gap is smaller than it looks. Sometimes a partial saves thirty percent, not sixty, because setup, water shut down, protection, pressure testing and access work happen either way. Get both numbers from the same company on the same day and compare them properly.
Kelowna numbers for comparison
Water lines only, supplied and installed in PEX, Central Okanagan market:
| Scope | Typical range |
| --- | --- |
| Full repipe, 3 bed, 2 to 2.5 bath, crawlspace or open basement | $8,000 to $13,000 |
| Full repipe, two storey, 3 bath | $11,000 to $18,000 |
| Full repipe, larger or multi level, 4 plus bath | $16,000 to $28,000 |
| Partial, accessible runs only | commonly 40 to 60 percent of the full figure |
Drywall repair is normally separate at $2,500 to $8,000 for a full repipe, and proportionally less on a partial. Confirm on every quote whether the number ends at open holes, at patched and ready to paint, or at finished and painted, because that single line explains most large gaps between quotes.
The questions to ask before you sign either one
1. Exactly which runs are being replaced, and which are staying, room by room.
2. What the completion letter will say, word for word.
3. Whether new shut off valves at each fixture are included. Original 1990s angle stops are usually seized and this is the cheapest time to replace them.
4. Whether the water service from the street is in scope.
5. Manifold or trunk and branch layout.
6. Where the drywall scope ends.
7. What it would cost to convert the partial to a full job later, quoted today.
That last question is the useful one. If the answer means you would end up paying more in total than doing it once, you have your decision.
The straight version
If you are doing this because of insurance, do the full repipe. If you are doing it because a renovation is already opening the walls, stage it and save real money. If you are doing it because you are worried about a flood, replace the pipe you cannot see first, because that is the pipe that costs the most when it lets go.
View Ultimate Plumber on the Okanagan Trade Directory
Ultimate Plumber is the plumbing arm of Timbercove Construction Ltd, a local owner operated company serving Kelowna, West Kelowna and Lake Country. Work is carried out by journeyman plumbers and gasfitters, and full and partial Poly-B replacement and repiping in copper and PEX is the company's specialty. Call 250-469-4046 or request a callback.