Poly-b plumbing is usually easily identifiable. Their distinct colour is one way to tell if your home has poly-b piping. Poly-b pipes are light plastic and are usually grey but can be in other colours, such as cream, black, or gray. These pipes may lurk underground, inside walls and ceilings, so you have to check some crawl spaces and places where pipes are exposed to find them. These places could be:

• Underneath the kitchen sink
• Near your water heater
• The main water shut off
• Near the toilet or bathroom sink