Education6 min read

Polybutylene Pipes and Your Mortgage in Florida: The Grey Pipe Insurers Refuse

OD
Onias Derilus
Broker / Owner · Mortgage Capital · Oct 1, 2025

Polybutylene pipes mortgage Florida buyers of 1978 to 1995 homes encounter are a supply-line problem, not a drain problem. Insurers decline them; a repipe fixes it. Budget it before the offer.

Educational content only. This article is for informational purposes and does not constitute financial, legal, or lending advice. Loan programs, rates, and eligibility requirements change frequently. Consult a licensed mortgage professional before making any borrowing decision. Mortgage Capital | NMLS# 1859012 | Licensed in Florida.

Polybutylene pipes mortgage Florida buyers of homes built between 1978 and 1995 encounter are the grey plastic supply lines that insurers refuse to cover.

A repipe to PEX or copper fixes it. Budget it before the offer. Our guide to cast iron pipes and your mortgage in Florida covers the drain-side cousin.

What it is

A grey or blue plastic supply pipe used widely from the late 1970s to the mid 1990s.

Chlorine in municipal water degrades it from the inside.

Fittings fail and leaks appear without warning.

A class action settlement paid for some replacements decades ago.

Much of it is still in the walls of Florida homes.

Which homes

Built or replumbed between 1978 and 1995.

Common in the suburban boom neighbourhoods of west Broward, west Palm Beach and south Miami-Dade.

See our guide to Federal Pacific panels and your mortgage in Florida for the electrical issue from the same era.

Manufactured homes from the period too.

Check the year, then check the pipes.

Insurers

The four-point inspection reports supply pipe material.

See our guide to four-point inspections in Florida.

Most Florida carriers decline polybutylene outright.

Some accept with a water damage exclusion.

Citizens has its own rules.

Lenders

The appraiser does not test pipes.

See our guide to low appraisals in Florida.

The insurance binder is the closing condition.

No binder, no closing.

The pipe problem becomes a loan problem through insurance.

Identifying it

Grey or blue flexible pipe at the water heater, under sinks, at the main shutoff.

Stamped PB2110.

A home inspector or plumber confirms.

See our guide to home inspections versus appraisals in Florida.

Partial replacements are common; check every access point.

The repipe

Replacement of all supply lines with PEX or copper.

Two to four days for a typical single-storey home.

Drywall patches and paint after.

Costs run into the several thousands, more for larger or two-storey homes.

A licensed plumber and a permit.

Who pays

Negotiate during the inspection period.

See our guide to seller concessions in Florida.

A seller credit, a completed repipe, or a repair escrow.

See our guide to USDA repair escrows in Florida for the escrow structure.

An insurer binding with a repipe condition sets the deadline.

Financing the repipe

Small enough for a seller credit or cash.

See our guide to HELOC versus home equity loans in Florida.

A renovation loan if bundled with other work.

See our guide to the FHA 203k in Florida.

Plumber financing at higher rates.

Timing with closing

Get the insurer's position in the first week.

See our guide to closing date delays in Florida.

Schedule the plumber inside the inspection period if the seller agrees.

Or after closing if the insurer binds with a condition.

Confirm in writing.

Condos

Unit supply lines are the owner's; risers are the association's.

See our guide to HOA and mortgage approval in Florida.

Buildings from the era may have it throughout.

HO-6 insurers ask about the unit.

Ask the association about the risers.

Rentals

Landlord policies decline it the same way.

See our guide to how to buy a rental property in Florida.

A leak in a rental is a tenant claim and a mould problem.

Repipe before placing a tenant.

A line in the rehab budget.

After the repipe

Keep the permit and the plumber's invoice.

See our guide to the after-closing checklist in Florida.

Send the updated four-point to the insurer.

Premiums may fall with new plumbing.

The next buyer's inspector will ask.

Water heaters and the era

Water heaters over fifteen years are a separate four-point item.

Replace both at once if the heater is old.

The plumber is already there.

See our guide to roof age and your mortgage in Florida for the roof from the same era.

Bundle the whole list.

Disclosure

Sellers must disclose known defects.

See our guide to AS IS contracts in Florida.

Many do not know the pipe type.

The four-point finds it.

Ask on the first showing for homes in the window.

Cost perspective

A repipe is a defined, one-time cost with a permit at the end.

It is less than a roof and more predictable than a seawall.

Insurance access is the prize.

Do not let it kill a sound house; price it.

The Florida DBPR licence lookup verifies the plumber.

PEX versus copper

PEX is cheaper, faster and resists chlorine.

Copper costs more and lasts longer but is vulnerable to Florida's water chemistry in some areas.

Insurers accept both.

Most repipes in South Florida are PEX now.

Ask the plumber which the water utility recommends locally.

Where to start

Check the build year and look at the pipe at the water heater on the first visit.

Order the four-point in the first week and get the insurer's position.

Then start a conversation and we will structure the repipe into the closing.

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