Have you found Poly B? It’s not the end of the world but you do need to be armed with this information. Don’t stop here. Search the web for more.
From the mid 80's through to 1997, Polybutylene (Poly B) piping was widely installed in homes built in North America. This is a grey piping, with the designation PB2110 printed on the side, as well as the CSA standard identifier B137.8. This piping, along with other flexible plastic piping, gained popularity because of the rising cost of copper as well as their ease of installation. It’s estimated that over 700,000 homes were built in Canada, with perhaps 200,000 here in BC, containing Poly B piping.
Any plumbing system may suffer sudden unexpected failure, but when considering the purchase of a home with Poly B, you must be aware of the increased instances of failure with this type of piping. While the piping is still listed by CSA (Canadian Standards Association), it’s no longer used in new constructions.
Problems began to develop with Poly B piping after less than 10 years. Leaks were being reported, and worse, undetected leaks caused structural damage and mold growth. Leaks would occur both at joints and along the length of pipes. Class action lawsuits were mounted, to compensate homeowners, which cost Shell Oil Company $1 billion in settlements. Claim submissions for all class action suits have now been closed.
There were a number of contributors to failure, such as:
In Canada, acetyl fittings were rarely used. The piping was installed with copper or brass fittings using copper crimp rings, which was the better system, and experienced fewer failures. However, in areas where high chorine levels exist, or where the hot water tank is set to higher than 55C/130F, the pipe itself can be compromised, deteriorating from the inside out. This makes it impossible to visually detect problem areas. Homes that have higher than the recommended 40-60 PSI water pressure are also vulnerable to failures. Poly B should never be directly connected to the hot water tank. There should be an 18” copper leader before the Poly B connection.
The semi-good news is that knowledge is power and Poly B doesn’t have to be the demise of your dream home deal. While there are no guarantees, there are methods to help preserve the Poly B in your home, including:
If replacement is desired, do your homework and shop around for a company that specialized in Poly B replumbing/repiping. These companies are often a one stop shop with in-house drywallers. Be sure you ask about their warranty. Expect a 7-10 day turnaround. While it’s not a visible upgrade, it will certainly increase the value of your home and give you peace of mind.
Finally, let’s take a look at Poly B and hydronic heating systems (in-floor radiant heating). Hydronic systems are not manufactured with corrosion resistant components. They are intended to recirculate the same water over and over again. These systems are not designed to carry oxygenated (fresh) water.
Poly B is oxygen permeable, meaning it allows oxygen into the circulating water via absorption through its walls. This oxygenated water will corrode system components, causing premature failure. Hydronic systems should NOT be plumbed with Poly B piping.
In conclusion, insurance companies have differing positions on Poly B piping, so be sure you have a conversation with your insurer before making any purchasing decisions. If you still have any inquiries about Poly B, contact our office immediately.