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What is the gray water pipe called?
Wednesday, January 29, 2020
Polybutylene is a gray plastic pipe that was used in residential construction from the 1978 through 1995, when manufacture was discontinued due to numerous leakage problems and lawsuits. It is also called “PB.” Although gray is the most common color, polybutylene can also be blue or black in color. It is usually stamped with the marking “PB2110” and the piping is 1/2” to 1” in diameter.
It is no longer an approved plumbing material by the building codes. Many insurance companies will not issue a new homeowner’s insurance policy to a home with PB, or will issue the insurance with a high deductible for any water damage. To learn more about it, see our blog post What does polybutylene pipe look like? Why is it a problem?
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