Problems With Polybutylene Pipes

If you own or are currently in the market for a new home, you’ve probably been warned about polybutylene piping at some point during the process. While some unsolicited advice may not be wholly worthwhile, warnings about poly piping are. There are a variety of reasons why you’ll want to make sure that all polybutylene piping in your home is replaced, most of which boil down to expensive and potentially serious property damage.

What’s Wrong with Polybutylene Pipes?

Polybutylene piping was used during the construction of millions of American properties in the 1970s and was quite popular due to its ease of installation and relatively low price in comparison to copper pipes. Over time, however, it became apparent that the structural integrity of polybutylene pipes could be easily compromised. To further complicated matters, poly pipes degrade from the inside, making it almost impossible to spot potential problems by simply examining the exterior. Degradation of polybutylene pipes can lead to significant property damage, and failures can occur with little to no advance warning.

Polybutylene Pipes and Your Homeowners Insurance

Because of the extensive damage that polybutylene piping failure can cause and the likelihood of sucha failure occurring, many homeowners’ insurance companies will deny coverage on properties with poly pipes or even cancel existing policies upon discovery of them. The problem of polybutylene pipe failure was so widespread that a class action lawsuit was settled in 1995, allowing involved homeowners to replace their pipes with money from a settlement fund. A full polybutylene pipe replacement is a big job and is serious enough that only licensed plumbers with extensive experience and a specialization in performing them should be hired to complete the work.

Buying a Home? Check for Polybutylene Piping

With interest rates at record lows, house prices near rock bottom, and sellers anxious to get rid of their homes in an overcrowded market, now is a terrific opportunity to get a great deal on a nice home.  New home construction is still slow, so most home buyers are looking at re-sales.

If you are looking at re-sales (previously owned homes), be sure to have the home thoroughly inspected before committing to the purchase.  If the home was built before the early 1990’s be sure the home inspector checks to see if the home was plumbed with polybutylene plumbing.  If in doubt, an inspection by a reputable local plumber could save you thousands of dollars in plumbing repairs for a polybutylene pipe replacement.

Polybutylene pipe was used for the hot and cold water supply pipes in millions of homes constructed after about 1970.  By the early 1990’s use of polybutylene pipe stopped because it was clear that most polybutylene pipes would fail after 5 to 15 years of service.

The exact cause of polybutylene pipe failure is not completely understood, but most experts believe that the pipe reacted to the chlorine in the municipal water supplies, causing it to become brittle and fail.  The only practical solution once the pipes start to fail is to have all of the plumbing in the home replaced.

Most homes built with polybutylene pipes have already had the pipes replaced, but you may find a few homes that still have the original polybutylene pipes.  If so, your options are to either steer clear or to make sure that the purchase price reflects the need to have all of the polybutylene pip replaced.