WHAT IS POLYBUTYLENE PIPING?
Polybutylene (PB) was a plastic manufactured between 1978 and mid-1995 for use as piping in home plumbing systems. It was inexpensive and offered plenty of advantages over other materials, such as flexibility, ease of installation, resistance to freezing. Pipes made from polybutylene were installed in up to 10 million homes in the Unites States during that period. Despite its strengths, production was ceased in mid-1996 after scores of allegations surfaced claiming that polybutylene pipes were rupturing and causing property damage.
WHY POLYBUTYLENE PIPES SHOULD BE REPLACED.
Leaking can happen without warning and can result in flooding and serious damage to a home’s interior if it is not immediately stopped. PB pipes installed behind sheetrock can leak unnoticed for long periods of time and cause mold and water damage. InterNACHI believes it is far cheaper to replace polybutylene pipes before they fail and release their contents onto floors, appliances, and furniture. They can also reduce a home’s value or prolong its time on the market. Homeowners might face higher insurance premiums or be denied coverage entirely.
HOW DOES POLYBUTYLENE PIPING FAIL?
Two studies in particular in papers published by the University of Illinois at Chicago have shown that certain disinfectants can react with the polybutylene and cause it to flake apart at any location within the PB piping system. Small fractures can deepen over time and eventually work their way to the pipe’s exterior, allowing water to escape. Some manufacturers, however, claim that the majority of leaks occur at joints and unions, which is where a leak would likely appear if a pipe were improperly installed. Despite this contention, class-action lawsuits filed against PB manufacturers have been successful and resulted in payouts to homeowners reaching $1 billion.