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  • Writer's pictureNeil Perry

Polybutawhat? No worries, we got you covered...

Polybutylene (PB) is a type of thermoplastic material that was widely used in the manufacture of water supply and plumbing systems from the late 1970s to the mid-1990s. The material was developed as a cheaper alternative to copper and other more expensive plumbing materials, and it became a popular choice for builders and homeowners alike. However, in the 1990s, concerns began to emerge about the reliability and safety of PB plumbing systems. In this article, we will explore the history, properties, uses, and potential problems associated with polybutylene plastic.

History of Polybutylene

Polybutylene was first developed in the 1970s by the German chemical company BASF. It was designed to be a lightweight, flexible, and affordable material that could replace more expensive plumbing materials like copper and galvanized steel. PB was introduced to the US market in 1978, and its popularity grew rapidly over the next two decades.

PB plumbing systems consisted of pipes and fittings that were joined together using crimped copper or brass fittings. The system was quick and easy to install, and it was much cheaper than traditional plumbing materials. By the 1990s, PB was being used in millions of homes across the US and Canada.

Properties of Polybutylene

Polybutylene is a type of thermoplastic material that is made from the polymerization of butene monomers. It is a flexible, low-density material that is resistant to heat and chemicals. PB pipes are typically white or gray in color and can range in size from 1/2 inch to 1 inch in diameter.

One of the key benefits of PB is its flexibility. PB pipes can bend and flex without breaking, which makes them ideal for use in tight spaces and areas where pipes need to be installed around corners and obstacles. PB is also resistant to freezing, which means it can be used in areas with cold temperatures without the risk of the pipes bursting.

PB pipes are also relatively lightweight, which makes them easy to transport and install. They are also resistant to corrosion, which means they do not rust like other plumbing materials such as copper and galvanized steel.

Uses of Polybutylene

PB was primarily used in the manufacture of water supply and plumbing systems. PB pipes were used to transport hot and cold water throughout homes and commercial buildings, and they were also used in irrigation systems and for swimming pool plumbing.

In addition to plumbing, PB was also used in the manufacture of automotive parts, toys, and other consumer products.

Potential Problems with Polybutylene

Despite its many benefits, PB plumbing systems have been associated with a number of problems and concerns. One of the primary concerns is the risk of leaks and ruptures. PB pipes can become brittle over time, especially when exposed to high levels of chlorine in the water supply. This can cause the pipes to develop small fractures and leaks that can lead to water damage and mold growth.

Another potential problem with PB plumbing systems is the risk of joint failures. PB pipes are joined together using crimped copper or brass fittings. These fittings can corrode over time, which can cause them to fail and result in leaks or ruptures.

In addition to these problems, PB plumbing systems have also been associated with a number of class action lawsuits. Homeowners across the US and Canada have filed lawsuits against manufacturers and builders for damages caused by leaks and ruptures in PB plumbing systems. Some homeowners have reported having to replace their entire plumbing system at a cost of tens of thousands of dollars.


Polybutylene was once a popular choice for plumbing and water supply systems. It was lightweight, flexible, and affordable, and it offered a number of benefits over traditional plumbing materials. However, concerns have emerged about the reliability and safety of PB plumbing systems.

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