How to Tell If Your Calgary Home Has Poly-B Plumbing

Short answer: Poly-B is a dull grey, slightly flexible plastic water pipe, usually stamped PB2110, often joined with copper or brass crimp rings. If your Calgary home was built or renovated between about 1978 and 1998, check the pipes at the water heater, along an unfinished basement ceiling and under the sinks. You can often confirm it yourself in a few minutes.

Finding Poly-B is usually a question of insurance and timing rather than an emergency. Here is how to tell what you have, and what it is not.

Three places to look

At the hot water tank. The pipes coming off the tank are the easiest to see. Grey, slightly flexible pipe with copper or brass crimp fittings is the tell.
In the basement ceiling. If it is unfinished, look up. Poly-B runs are usually visible along the joists.
Under sinks, at the shut-off valves. Check where the supply lines meet the valve, and at the main shut-off near the water meter.

What does the stamp say?

Look along the pipe for printing. Poly-B is usually stamped PB2110, and some is marked CSA B137.8. No stamp does not mean it is not Poly-B, because printing fades and gets painted over. The Government of Alberta's Poly-B safety tips bulletin describes the pipe and fittings used in Alberta homes.

Poly-B or something else?

Pipe	What it looks like	What it means
Poly-B (polybutylene)	Dull grey, slightly flexible, often PB2110 stamped, copper or brass crimp rings	The pipe insurers are concerned about. Plan to replace it
PEX	Red, blue or white, sometimes grey but clearly labelled PEX	The modern replacement. Not a problem
Copper	Rigid metal, copper coloured or darkened with age	Not Poly-B
Kitec	Often blue or orange, with brass fittings, labelled Kitec	A different problem pipe. Worth an assessment too

Grey PEX exists, which is why reading the print on the pipe matters. If it says PEX, it is PEX.

What if only part of the house has it?

Some homes were partly repiped during a renovation or after a leak. You might see PEX or copper in one area and grey pipe in another. Insurers usually want to know the share of each type, so a full check is worth it before you call your broker.

Found it. What now?

Take a photo of the pipe and any stamp.
Check your insurance. Many Alberta insurers now ask about Poly-B. Here is what to know.
Get a real number. Most whole-home replacements in Calgary cost $8,000 to $15,000. Here is what moves the price.

We confirm it for free and explain your options with no pressure.

Common questions

What years was Poly-B used in Calgary homes?

Mostly in homes built or renovated from the late 1970s to the late 1990s. A home outside that range can still have it if it was renovated then.

Is grey plumbing pipe always Poly-B?

Usually, but not always. Some PEX is grey. Read the printing on the pipe: PB2110 means Poly-B, PEX means PEX.

Can a home inspector identify Poly-B?

Yes, inspectors flag it often. If the runs are hidden behind finished walls and ceilings, a plumber can confirm it at the water heater, the main shut-off and the fixture connections.

Does Poly-B have to be replaced right away?

Not usually as an emergency, but it should be planned. It can fail without warning, and insurers may set a deadline.