How to spot it
- Most poly-B is grey, though black or blue turns up, and it bends easily. It is often stamped with codes like PB2110 along its length. Look where pipes are exposed: near the water heater, at the main shut-off, under sinks, and in unfinished basement ceilings. Fittings may be plastic or metal crimp rings.
- It is easy to mix up with PEX, which comes white, red or blue and is printed PEX. When in doubt, a plumber can identify it in a minute.
Why it is a concern
- Poly-B can fail without warning, often at fittings, especially older plastic fittings. Exposure to chlorine in water, high temperatures and poor installation are thought to contribute. Failures can release a lot of water quickly.
- Because of this, some insurers now quiz owners about poly-B and may charge more, limit coverage or require replacement. Check with your insurer.
Quick checklist
- Look for grey pipe
- Check stamps
- Ask your insurer
- Plan replacement
- Get a quote
Repair or replace
- Replacing failed fittings with modern ones is a stopgap. The pipe itself remains. Full replacement with PEX or copper is the lasting fix and usually satisfies insurers.
- In many houses, replacement can be done with modest wall openings by using basement ceilings, closets and existing chases.
Planning the work
- We measure how much poly-B the house still holds, plan a route, and estimate openings. Every new line holds test pressure before any patching. You get a record of the work for your insurer.
- If you are buying a home with poly-B, factor replacement into your plans.
Richmond Hill note: most houses here sit on York Region municipal water with fairly hard supply, and many basements have a floor drain tied to the sanitary lateral. Mention both on the phone; it changes what goes on the truck.
Want a second opinion on your own pipes first? Dial (365) 363-1575; the person answering holds the wrench.