Emergency plumbing in Tempe's early 1980s tracts
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The tracts built at the end of Tempe's build out carry a different pipe and a different problem. Polybutylene was installed widely from the late 1970s into the mid 1990s, and it is a known failure class rather than a run of bad luck.
Why polybutylene fails
Polybutylene degrades through contact with treated water. The damage happens on the inside surface, it accumulates, and the pipe becomes brittle where it looks fine from outside. Fittings and joints usually go before the tube does.
It fails without warning and it fails under pressure, which is why the calls about it are almost always emergencies rather than slow drips noticed over weeks.
How to tell whether you have it
Polybutylene is usually grey, sometimes blue or black, flexible rather than rigid, and roughly half an inch to an inch across. Look where the supply enters the house, at the water heater connections, and at any exposed run in a garage.
If you find it, say so when you call. It changes what the truck carries and it changes the conversation about whether a spot repair is worth doing.
Repair, or repipe
A spot repair on polybutylene fixes the piece that failed and leaves the rest of the system at the same age, in the same water, with the same chemistry. Second and third failures are common and they are not bad luck.
Ask for the repipe number alongside the repair number. It is frequently the cheaper answer across two years, and it is the only one that ends the problem.
Common questions
How do I tell whether I have polybutylene?
It is usually grey, sometimes blue or black, flexible rather than rigid, and roughly half an inch to an inch across. Check where the supply enters the house, at the water heater connections, and any exposed run in the garage.
Why does polybutylene fail without warning?
It degrades from the inside through contact with treated water. The pipe becomes brittle where it still looks sound from outside, and the fittings usually give before the tube does. That is why these are almost always emergency calls rather than slow drips.
Is polybutylene still covered by any settlement?
The class action settlements that covered it closed decades ago. Assume there is no claim to make and price the work on its merits.
Should I repipe the whole house?
Ask for the number. A spot repair leaves the rest of the system at the same age, in the same water, with the same chemistry, and repeat failures on polybutylene are the norm rather than bad luck. Across two years the repipe is frequently the cheaper answer and it is the only one that ends it.
Source: United States Census Bureau, decennial counts and housing year-built data; Salt River Project, published water quality data