Polybutylene repipe in Tampa

Polybutylene is a gray plastic supply pipe that was installed in an enormous number of Florida homes between roughly 1978 and 1995. It was cheap, flexible and quick to fit. It also fails, usually at the fittings, and usually without warning.

Two things bring people to this page. Either a fitting has let go and flooded something, or an insurance inspection has flagged the plumbing ahead of renewal.

Identifying it

• Color and feel. Dull gray plastic, flexible, with a matte rather than glossy surface. Occasionally blue or black on exterior runs.
• Fittings. Often plastic or copper with crimped metal bands.
• Where to look. At the water heater connections, under sinks, at the main shut-off, or where pipe enters the building.
• Age of the house. If it was built or replumbed between about 1978 and 1995 in Florida, it's a real possibility.

Don't confuse it with PEX, which is also flexible but comes in red, blue or white and is the current standard. If you're unsure, send us a photo.

Why it fails

The accepted explanation is that oxidants in treated public water attack the material and the fittings over time, making them brittle from the inside. The failure isn't gradual seepage you notice early. It's typically a fitting letting go, with the full pressure of the supply behind it.

That matters for how you weigh the risk. A pipe that leaks slowly gives you warning. One that fails abruptly, often inside a wall or ceiling, doesn't.

The insurance picture in Florida

This is what has turned poly-B from a slow background concern into an active one. Florida insurers have tightened up on older homes, and pre-renewal inspections now routinely flag polybutylene. Homeowners report it affecting what cover they can obtain and on what terms.

A caution on sourcing, because this subject attracts a lot of motivated writing. Much of what circulates online comes from repipe contractors and from law firms seeking claim clients, and specific claims about individual carriers and their rules vary between sources and change over time. We're not going to restate those as fact. Check your own policy and ask your own insurer directly, in writing.

What we can say from the work itself: we're replacing more poly-B now than we were a few years ago, and a meaningful share of those jobs start with an inspection letter rather than a leak.

What a repipe involves

1. Survey the existing system, fixture count and routes.
2. Plan new routes, usually through the attic and down inside walls rather than following the original paths.
3. Permit, which we handle.
4. Run the new pipe while the old system is still live, so you keep water through most of the work.
5. Cut over, pressure test, inspect.
6. Patch and make good, with the extent agreed up front.

Most households stay put throughout. The supply goes off for the changeover itself, not for the whole job.

Partial or whole house

People ask whether they can replace just the section that failed. You can, and occasionally it's the right call for budget reasons. But the rest of the system is the same material, the same age and has had the same water through it. A partial repipe leaves the remaining poly-B in place, which means the insurance position generally doesn't change and the risk largely doesn't either.

We'll do a partial if that's what you want and we'll tell you honestly what it does and doesn't achieve.