Complete Poly B Pipe Replacement in Coquitlam

What Makes Poly B Different from Other Plastic Pipe

Polybutylene (ASTM D3309) was manufactured and installed across North America from 1978 through the mid-1990s. It was championed as a cheaper, easier-to-install alternative to copper. The problem wasn't the material itself on day one — Poly B can hold pressure just fine when it's new. The problem is what happens over decades of exposure to chlorinated water.

Municipal water systems in BC are treated with chlorine and, increasingly, chloramines. These oxidants attack the inner wall of Poly B pipe microscopically. The degradation is invisible from the outside — you cannot look at a Poly B pipe and know whether it has three years of service life left or three weeks. The failure mode is sudden: a section of pipe that has lost structural integrity from the inside will crack under normal water pressure without any warning event.

Copper corrodes predictably and visibly. PVC becomes brittle in cold but doesn't oxidize. Poly B degrades in a way that is invisible, progressive, and ultimately catastrophic. That's why insurers treat it differently from every other plumbing material.

• Poly B is grey, semi-flexible plastic — not copper, not white PVC
• Common in BC homes built 1978–1995
• Inner wall oxidation is invisible from the outside
• Failure is sudden — no visible warning signs
• Most common failure points: elbows, fittings, and anywhere chlorine concentration is higher

The Insurance Situation in BC

By 2020, most major BC insurers had begun aggressively addressing Poly B in their books. Some sent non-renewal notices. Others added Poly B-specific surcharges of $300–$1,200 per year. A handful refused to write new policies for homes with known Poly B until replacement was documented. This isn't a bluff. Insurers have claims data going back 20+ years that show Poly B homes generate dramatically more water damage claims than homes with copper or PEX plumbing.

For homeowners, the practical consequence is: if your BC home has Poly B and you haven't replaced it, your insurance situation is likely deteriorating. You may have already received a notice. Or your broker may be quietly shopping for a carrier that will still take your policy. Either way, the window to get ahead of it is now.

A completion certificate from a licensed plumber confirming full Poly B removal is, in almost every case, enough to trigger a policy reinstatement or surcharge reversal. We produce that documentation on every job we complete.

The Replacement Process — What Actually Happens

A full Poly B replacement is a planned, systematic job. Our crew walks the home first, traces every accessible run, and builds a scope before touching a pipe. Then we work section by section — typically starting in the mechanical room, moving through the crawl space or basement, and working up through the home. Water is off during working hours and restored each evening. Most single-family homes in Coquitlam are complete in one to three working days.

We use PEX-A with expansion fittings. PEX-A (cross-linked polyethylene, Type A) is more flexible than PEX-B or PEX-C, handles thermal movement better, and the expansion fitting method creates a joint that gets tighter under pressure rather than looser — the opposite of a compression fitting. Every insurer we work with accepts PEX-A as the replacement standard.

Walls are opened only where necessary. Most of the Poly B in a typical BC home is accessible through the crawl space, mechanical room, and inside cabinets — so drywall cuts are usually minimal. Any penetrations we make are patched and primed before we leave.

• PEX-A with expansion fittings — the highest-integrity residential repipe method
• Water restored each evening — no overnight disruptions
• Minimal drywall access — most runs accessible without wall cuts
• Permit pulled where required by the BC Building Code
• Completion certificate and photo documentation on every job

How Long Does It Take and What Does It Cost?

Timeline depends on home size, number of storeys, crawl space accessibility, and whether there are complicating factors like finished ceilings over main runs. A 1,500–2,000 sq ft single-family Coquitlam home typically takes 1–2 days. A 3,000 sq ft two-storey with a finished basement is more likely 3 days.

Cost in Coquitlam typically runs $4,500–$12,000 for a full single-family repipe. Strata units and smaller townhomes are often less. We give a flat-rate written quote after the free inspection — no hourly billing, no surprise line items. What the quote says is what you pay.