|Acetal fitting shows signs|
- Polybutylene pipe is grey, black or blue. Interior polybutylene plumbing is almost always grey and exterior polybutylene plumbing is mostly blue.
- Polybutylene pipe was installed and manufactured from the late 1970's till the mid-1990's, however, stockpiles of polybutylene pipe at supply vendors, such as supply risers were still known to be available up to 1999.
- The most common sizes for polybutylene pipe are 3/8", ½", ¾" and 1".
- Polybutylene piping was easy to install and often used as a replacement for copper.
- Polybutylene was often routed through the attic, a disaster in waiting.
- Polybutylene piping was used for both residential and commercial water distribution piping.
- Polybutylene pipe connectors can be copper, brass, or plastic. The connector types are barbed with a crimp ring or compression with a plastic or metal ferrule.
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