Repiping a polybutylene house in Tampa Bay, and the records your insurer will ask for

Every few weeks someone in Tampa Bay learns the word polybutylene from an insurance agent. The house has never had a leak, the pipes are behind drywall where nobody has looked at them in thirty years, and a renewal or a new policy suddenly turns on what they are made of. The answer is a repipe, and the job is only finished for the insurer when the paperwork is: a permit, two inspections, and a new four-point report that says PEX or copper. This guide covers the pipe, the rule, the job and the records.

Is it polybutylene?

Polybutylene is a grey (sometimes blue or black) flexible plastic supply pipe that was installed in a large share of American houses, and an especially large share of Florida houses, from roughly 1978 to 1995. It was cheaper than copper and fast to run, which suited the subdivisions that went up across Hillsborough and Pinellas in those years: Bloomingdale, Heather Lakes, and Kingsway in Brandon; Carrollwood Village and Northdale; Bardmoor and Highland Lakes in Largo; the Mainlands, Pinebrook, and Lake Forest in Pinellas Park; Countryside in Clearwater. If your house is from those years and has not been repiped, it very likely has it.

The pipe itself is usually visible where it comes out of a wall: under a sink at the supply stops, at the water heater, at the washing machine box, or in the attic. Grey plastic tubing with copper crimp rings or grey plastic fittings is the signature. Do not confuse it with PEX, which is a later and different plastic, usually red, blue, or white, with brass or plastic fittings and a manufacturer’s name printed along the pipe.

The problem was never the straight runs; it was the fittings and the way the material reacted to chlorinated water over time, which made joints fail without warning. A class action settled in the 1990s, the product went out of use, and the houses that have it are now all past thirty years old.

Why the insurer asks

Citizens Property Insurance, the state-backed insurer that writes a large share of Tampa Bay policies, publishes its answer. Its FAQ states that “dwellings 20 years old or newer with polybutylene piping may be eligible for coverage with Citizens if there are no signs of leaks, unrepaired water damage, disrepair or hazards” (Citizens FAQ on polybutylene).

Read the age threshold against the dates above. Polybutylene stopped being installed around 1995, so a house that has it is at least thirty years old in 2026 and does not fall within “20 years old or newer.” In practice that means a house with polybutylene supply lines is not eligible with Citizens until the pipe is replaced. Private insurers set their own rules, and many of them draw the same line or price the risk heavily; some will write the policy with a plumbing exclusion, which is a policy that does not cover the thing most likely to happen.

None of that is a decision the plumber or this site makes. The underwriter decides eligibility. What the plumber provides is the repipe, the permit, and the inspection record that the underwriter wants to see.

What a repipe involves

A repipe replaces every supply line in the house from the main shutoff to each fixture, leaving the drains alone unless they are being done too. In a one-story slab house, which is most of the polybutylene housing in Tampa Bay, the old pipe is under the slab and in the walls and is simply abandoned in place; the new pipe runs overhead.

• The material. Almost every Tampa Bay repipe uses PEX, flexible cross-linked polyethylene pulled through the attic and down the walls with far fewer fittings than copper. It does not corrode on chloraminated water, tolerates the attic heat, and is quick to install. Copper is the alternative for owners who want it; a contractor should say plainly that under-slab copper is the pipe that develops pinholes on this water, and that overhead copper is more labor.
• The route. Up from the water heater into the attic, across, and down to each bathroom, the kitchen, the laundry, and the hose bibs. Each drop means a hole in the drywall at the fixture, patched afterward. Ask whether patching and texture are in the quote or excluded; it is the most common surprise.
• The time. Two to four days for a typical three-bathroom house, with the water off for part of one day at the cutover. You can usually stay in the house.
• The permit. A repipe is a permitted plumbing job everywhere in Hillsborough and Pinellas; the records it produces are listed below.

The records that close the question

An underwriter does not take a homeowner’s word that the pipe is gone. Keep these together with the house papers:

• The permit number and the final inspection. A repipe is inspected at rough-in, with the new pipe visible before the walls close, and at final. The passed final is the document that says the work was done to code.
• The Notice of Commencement, recorded before the first inspection on a direct contract over $5,000 (s. 713.135, Florida Statutes). The contractor usually prepares it and you sign it.
• An invoice that names the material: PEX or copper, and that every supply line from the main shutoff to each fixture was replaced. “Repaired leak” or “partial repipe” will not satisfy an underwriter asking about polybutylene.
• A new four-point inspection. Citizens requires a four-point inspection for a home more than 20 years old applying for a new policy, dated within 12 months. Its plumbing section records the supply pipe material, so the report done after the repipe is the one that says PEX. If you are buying a house from those years, get the four-point before closing; it is what turns “probably polybutylene” into a line on a form.

What to ask before you sign

Which pipe, by brand, and which fittings. Whether the quote includes the permit, the drywall patching, the hose bibs, and the water heater connections. How many days, and how long the water is off. What the warranty on the pipe is separately from the warranty on the labor. And, if the repipe is for an insurer, whether the contractor will provide the permit number and the final inspection record in a form the underwriter accepts.

Sources checked and text reviewed September 19, 2026. Insurers change their guidelines; the underwriter’s answer governs.