What your Calgary home's pipes are made of, and how to tell
Written for Calgary homeowners · Last reviewed September 23, 2026
Somebody has asked what your pipes are made of — a home inspector, an insurance renewal, a headline about lead — and you are in the basement looking at a pipe you cannot name. Nearly all the advice online is written for Canada as a whole or for the United States, and on this question Calgary is genuinely different.
Short answer: in a Calgary house the buried water line is very probably copper. The City states that lead service connections here were used “only…for a short time period, primarily between 1939 and 1947, during World War II,” and that “the majority of water service pipes in Calgary, including homes built prior to 1950, are made of copper.” The national rule of thumb — anything before 1975 is a lead suspect — badly over-flags Calgary homes. If your house predates the 1990s, the lead question worth your time is the solder in the joints and the brass in the taps, not the pipe. And if it went up between roughly 1978 and the mid-1990s, the material that actually costs Calgary homeowners money is grey plastic, not lead.
Source: The City of Calgary — Lead and water service lines (confirmed 23 September 2026)
Below: how to tell what you have in five minutes using the City's own test, what its public pipe map does and does not tell you, and what each material means for money. Where we could not verify something we say so — the point of this site.
The rule of thumb you have read does not describe Calgary
The national picture, from Health Canada: “Widespread installation of lead service lines occurred in Canada until 1975,” and installation “continued until 1980 in some provinces and territories.” Lead-bearing solder “continued until 1986,” and the National Plumbing Code has prohibited it “since 1990.” Galvanized steel was permitted until 1980.
Source: Health Canada — Lead in Drinking Water, guideline technical document (confirmed 23 September 2026)
Now put Calgary's own statement beside it. The City names a window of nine years — 1939 to 1947 — and says “primarily.” Everything else, including homes built before 1950, it describes as mostly copper.
The gap matters. Someone with a 1962 Calgary bungalow reading a national article is told they sit inside a lead window running to 1975; their own utility puts them nowhere near it. We found no other Calgary page making this correction, which is why it leads this one.
What we will not print. News outlets have published counts of how many Calgary households remain on lead connections. The City's lead page carries no such figure, and we will not repeat a number our own utility does not publish. For your address, ask 311.
Five minutes, a magnet and a coin
The City publishes the identification test itself, which is unusual and useful. No plumber needed.
- Find where the water comes in. Follow the pipe to your meter, usually on a basement wall on the street side. The pipe on the street side of the meter is your water service.
- Look at the colour. “Copper pipes will be a brownish, copper colour.” “Galvanized steel pipes will be grey.” “Lead pipes are a dark, matte grey.”
- Hold a magnet to it. “A magnet will stick to galvanized steel. A magnet will not stick to a lead pipe.” This settles the grey-versus-grey problem at no cost.
- Scratch it gently. “If you scrape a lead pipe with a coin or screwdriver, the metal will be soft and turn shiny.” Copper and galvanized will not give way like that.
- Photograph it, dated. It is the most useful thing you can hand a plumber, an insurer or a buyer's agent later.
Source: The City of Calgary — Lead and water service lines
One honest limit: this covers the pipe you can see — not what is buried in the yard, and not the joints.
What is likely in your house, by the decade it went up
Treat the build year as a starting point for where to look, never as an answer — any house can have been re-plumbed, and plenty here have been.
| Built | Buried water service | Supply pipe inside | Worth checking |
|---|---|---|---|
| Before 1939 | Copper, per the City's pre-1950 statement | Galvanized steel, permitted nationally to 1980 | Galvanized — use the magnet. Solder too, if re-plumbed before 1990. |
| 1939–1947 | The only window the City names for lead — and it says “primarily” | Galvanized or copper | The one era where a lead connection is a live possibility. Magnet and scratch test, then book the City's free tap sampling. |
| 1948–1979 | Copper | Copper, or galvanized to the 1980 code change | Solder — lead-bearing solder stayed in use to 1986. |
| 1980–1989 | Copper | Copper; Poly-B from 1978 on | Both: solder up to 1986, and grey plastic. |
| 1990 to mid-1990s | Copper | Poly-B common in this window | Poly-B, and what your insurer says about it. |
| Mid-1990s on | Copper or plastic | PEX and copper | Little on this list. We found no Canadian publication dating the Poly-B-to-PEX changeover, so treat the boundary as approximate. |
The City's pipe map answers a different question than the one you asked
The City publishes a searchable Public Water Service Lines map: type in your address, get a material. Good open data — and almost every article that mentions it misses the sentence that matters:
“The data shown here only relates to the portion of the water service pipe on public property, owned and operated by The City.” And: “The material on private property can be a different material, and could have been installed at a different time.”
Source: Open Calgary — Public Water Service Lines map (confirmed 23 September 2026)
That reverses the usefulness of the tool. The map covers the pipe the City owns and would pay to fix. What it does not cover — property line to house — is what you own and pay for. The City is explicit: “all pipes, solder and fittings on private property are the responsibility of the property owner.”
Sources: The City of Calgary — Lead and water service lines and The City of Calgary — Water service lines in Calgary
So a clean “copper” result is good news about the City's half and says nothing about yours. Where that split falls is worth ten minutes on who owns which pipe in Calgary before you spend anything.
Pre-1990? The lead question is the solder and the brass
Lead does not only arrive through a lead pipe, and this is the part the material-by-material articles skip. Health Canada: “Lead may be found in brass and bronze fittings, such as faucets and valves,” and historically “most brasses contained between 2% and 8% lead.” Galvanized is on the list too — it “can also be a source of lead, as lead is present as an impurity.” And lead-bearing solder joined copper pipe here until 1986.
Source: Health Canada — Lead in Drinking Water, guideline technical document
So the honest Calgary question is not “do I have a lead pipe.” It is: was anything here soldered before 1990, and how old is the brass? For most Calgary homes that is the only lead exposure on the table, and a copper result does not rule it out. Two free things the City offers:
- The Tap Water Sampling Program. A “free annual tap water sampling program,” registered through 311. “Sampling takes place between May 1 and September 30,” “first come, first serve” — so if you are reading this in February, diarise it for spring. A measured result beats every guess on this page.
- A filter rebate. The City offers “a rebate for an NSF-53 certified, kitchen-tap mounted or built-in water filtration device, an NSF-58 certified reverse osmosis system, or an NSF-62 certified distillation system.” Check the certification number on the box — a filter outside those three is not what is described.
Source: The City of Calgary — Lead and water service lines
For a tap that has sat unused, the City's advice is to let it run — “two to three minutes if it has been a few hours.” It also says removing a lead service line is “a shared responsibility between The City of Calgary and the homeowner,” and that it will not do the public half alone, because “partial replacement…can disturb any remaining lead and may increase the amount of lead found in your drinking water.”
Grey plastic: Poly-B, and why it matters more here than lead
For most Calgary homeowners who actually write a cheque over pipe material, the material is polybutylene — Poly-B. It was “widely used for home plumbing systems from 1978 to the mid-1990s,” covering much of Calgary's suburban build-out. Usually grey, sometimes black, white or blue, often stamped PB2110 or CSA-B 137.8 — though no stamp does not rule it out. Look under sinks, at the hot water tank and at the meter.
Source: Square One Insurance — Poly-B plumbing. Square One is an insurer, not a code authority; this is their published guidance, cited as such.
The described failure mode is fittings and pipe degrading over time rather than one dramatic event, and the practical consequence is usually an insurance conversation: higher premiums, higher deductibles, or a renewal that does not happen. That makes grey pipe under your sink worth more attention than a lead headline.
One claim we are not making. Several Calgary pages assert our tap water is unusually hard on Poly-B. Chlorine degradation is a real described mechanism, but The City's water-treatment page publishes no distribution disinfectant residual we could cite — so we have no basis for saying Calgary water is worse for Poly-B than anywhere else. Ask 311 for the number rather than taking ours.
Poly-B replacement is a specialist job we do not cover. There is a Calgary site dedicated to it, with scope, sequencing and cost detail this page would only summarise badly: polybreplacementcalgary.com. Go there for that decision.
Galvanized steel usually shows up as a pressure complaint
Galvanized is the other grey pipe, and the magnet separates it from lead. Permitted nationally until 1980, it turns up in older Calgary houses and in houses only part re-plumbed. People rarely go looking for it — they notice the upstairs shower has gone feeble. The trade's explanation is corrosion and scale narrowing the bore until flow drops; we found no City or federal publication saying so, so treat it as the trade's account, not a cited fact. What is cited is that galvanized carries lead as an impurity.
If a weak shower brought you here, diagnosis order matters more than material: start at low water pressure in Calgary homes, and remember our hard water scales every material, not just steel. If the drop came with a bill you cannot explain, that is a different trail — high water bill, find the leak or leak detection.
The drain side: cast iron, clay, and the only answer that counts
Everything above is the supply side. The drain side is separate and more expensive, because the buried lateral to the City main is yours to fix. Older Calgary houses commonly drain through cast iron inside and clay tile outside; newer ones use plastic. We are not putting dates on that: unlike the supply side, we found no City or federal publication dating drain materials here, and we would rather leave a gap than fill it with confidence we have not earned.
There, material and condition are the same question, and only a camera answers it. Buying? That is a sewer scope before you buy. Already own it and it keeps backing up? Start at drain cleaning, then read sewer line repair before anyone quotes a dig — City permit requirements move that price and most quotes never mention them.
What to actually do with this
Do the magnet test this week, and when you take quotes, ask what the plumber found, not what they assume: anyone naming your pipe material without looking is guessing from the build year, exactly like the articles. Costs are on what a plumber costs in Calgary; if you mean to do it yourself, read DIY plumbing and the law in Alberta first. None of this is urgent unless water is coming out of something — if it is, that is emergency plumbing.
Not sure what you are looking at?
Send a photo of the pipe where it enters your basement and roughly when the house was built. We will tell you what it looks like and whether it needs anything — including when it does not.
Questions Calgary homeowners actually ask
My house is from the sixties. Do I have lead pipes?
Almost certainly not, and this is the bit the national articles get wrong for us. Health Canada's national picture is that lead service lines went in across the country until 1975, which is where the “anything older than the mid-seventies is suspect” line comes from. The City of Calgary's own account of its system is much narrower: lead connections here were used “only…for a short time period, primarily between 1939 and 1947, during World War II,” and “the majority of water service pipes in Calgary, including homes built prior to 1950, are made of copper.”
So a sixties bungalow in Calgary is nowhere near the window the City describes. Go and check anyway — it takes five minutes with a magnet and a coin — but do not spend a week worrying about it first.
The thing that is worth a second look in a house that age is the solder in the copper joints, not the pipe itself. Lead-bearing solder was still in use in Canada until 1986.
The City's map says my service line is copper. Does that settle it?
It settles half of it, and unfortunately it is the half you do not pay for. The dataset's own description says the data “only relates to the portion of the water service pipe on public property, owned and operated by The City,” and adds that “the material on private property can be a different material, and could have been installed at a different time.”
So the map covers main-to-property-line, which is the City's pipe and the City's bill. The stretch from your property line into the house is yours, in both senses, and the map is silent on it. The City is blunt about that elsewhere too: all pipes, solder and fittings on private property are the property owner's responsibility.
Look up the map by all means. Then go and look at the pipe where it comes through your basement wall, because that is the one that tells you about your side.
There's grey plastic pipe under my sink. Is that Poly-B, and how urgent is it?
Quite possibly. Polybutylene — Poly-B — was widely used in Canadian homes from 1978 to the mid-1990s, which lines up with a huge amount of Calgary's suburban build-out. It is usually grey, though black, white and blue exist, and the pipe is often stamped PB2110 or CSA-B 137.8. No stamp does not mean it is not Poly-B.
Urgency is the wrong frame. It is not a safety issue the way a gas leak is. It is an insurance and water-damage issue: Canadian insurers take a hard line on it, and people find that out at renewal or after a claim rather than in advance. That is the conversation to have first.
Replacing it is a specialist whole-house job and not something we take on, so we will not pretend to price it here. There is a Calgary site that covers only that work — polybreplacementcalgary.com — and it is the right place to go for the scope and the sequencing.
How do I get my water tested for lead here, and what does it cost?
The City runs a free annual tap water sampling program. You register by contacting 311 and asking for the Tap Water Sampling Program. Sampling runs between May 1 and September 30, on a first come, first serve basis.
Which means two practical things. One, it costs nothing, so if you have any reason to wonder, there is no argument for guessing. Two, it is seasonal — if you are reading this in January you cannot get it done in January. Put a note in your phone for the spring.
There is also a City rebate for an NSF-53 certified tap-mounted or built-in filter, an NSF-58 reverse osmosis system, or an NSF-62 distillation system. The certification number is the thing to look for on the box; plenty of filters on the shelf are none of those three.
My pipes are galvanized. Do I have to repipe the whole house?
Not automatically, no. Galvanized steel was permitted under the national code until 1980 and there is a lot of it still working in older Calgary houses. What usually forces the decision is not the material, it is the symptom — the shower that has gone feeble, or a pinhole leak.
The trade's explanation for the pressure drop is corrosion and scale gradually narrowing the inside of the pipe. We will be straight with you: we could not find a City of Calgary or federal publication that states that, so treat it as the standard trade account rather than something we can cite. What is cited is Health Canada's point that galvanized pipe can itself be a source of lead, because lead is present in it as an impurity.
If pressure is the complaint, work the diagnosis in order before anyone quotes you a repipe. Low pressure in a Calgary house has several more common causes than the pipe material, and a partial repipe of the worst runs is often the honest answer rather than doing the lot.
Does it matter what my drain pipes are made of?
It matters more than the supply side does, financially, because the buried drain lateral from your house to the City main is yours to repair and it is the expensive one to dig up.
Older Calgary houses commonly have cast iron inside the walls and clay tile in the ground; newer ones are plastic. We are deliberately not putting build-year ranges on that the way we did for the water side, because we could not find a City or federal publication that dates drain materials in Calgary housing stock, and we would rather leave the gap visible than fill it with a guess.
In any case, on the drain side the material and its condition are really the same question, and the only thing that answers it is a camera down the line. If you are buying, that is a sewer scope. If you already own the place and it keeps backing up, that is a camera as part of the diagnosis, not an optional extra.