⚠️Deal-Killing Plumbing Defects in Florida
These defects appear in FL home inspections and directly threaten sales — causing price reductions, buyer walk-aways, insurance denials, and failed closings. Know them before your inspector does.
🚨 Polybutylene Supply Pipe DEAL KILLER
Polybutylene ("poly" or "Quest pipe") is gray, flexible plastic pipe installed in millions of Florida homes from approximately 1978–1995. It reacts with chlorine in municipal water supplies, causing the pipe to become brittle and crack from the inside — often with no external warning until a catastrophic failure occurs.
How to identify: Gray plastic pipe, usually 1/2" or 3/4" diameter, with blue, white, or gray fittings. Often found at the water heater, under sinks, and behind walls. Common brand names: Shell Oil "Quest," Vanguard, Qest.
FL insurance impact: Citizens Insurance will not insure homes with polybutylene supply pipe. Most private FL insurers have the same policy. This is a policy-level exclusion — not a surcharge — meaning the home becomes uninsurable until repipe is complete. No insurable home = no mortgage = no sale for 90%+ of buyers.
FL class-action context: The Cox v. Shell class action (1995) established a settlement fund for poly replacement. That fund is exhausted, but the repiping need remains. Florida plumbers have completed hundreds of thousands of polybutylene repipes.
Impact: Policy denial, mortgage denial, deals fall apart at inspection
Solution: Full repipe to PEX or CPVC — $3,500 to $7,500 for a 3-bed/2-bath FL home
🚨 Galvanized Steel Supply Pipe (Corroded) MAJOR
Galvanized steel pipe was the standard residential supply material until roughly 1970. The zinc coating reacts with Florida's mineral-rich water, creating rust buildup that progressively reduces pipe ID, restricts flow, and eventually causes pinhole leaks. In FL's high-humidity environment, external corrosion accelerates as well.
Inspection findings: Inspectors note low water pressure at fixtures (from internal scaling), visible rust staining at joints, corrosion at fittings, and "orange water" in older homes. A licensed plumber can camera the interior and show cross-sectional scaling that documents the remaining pipe life.
FL insurance impact: Active corrosion on galvanized supply can trigger Citizens Insurance policy denial or a large surcharge. Inspectors typically note galvanized pipe age and estimated remaining life. Homes with 50+ year galvanized pipe often see insurance surcharges of $500–$1,500/year.
Buyer concern: Many FL buyers — especially those using conventional financing — will request a price reduction equal to the repipe cost plus a contingency buffer when galvanized pipe is found. A $5,000 repipe request from the buyer often becomes a $7,500–$10,000 negotiation.
Impact: Insurance surcharge, buyer price reduction request, delayed closing
Solution: Repipe to copper or PEX — $4,000 to $9,000 for typical FL home
⚠️ Cast Iron Drain Pipe Failure MAJOR
Cast iron drain, waste, and vent (DWV) pipe was used in virtually all Florida homes built before approximately 1975. Florida's acidic soil, high water table, and humidity accelerate both internal and external corrosion of cast iron. After 40–50 years, cast iron pipes commonly show: scaling that reduces drain capacity, pitting that causes chronic clogs, cracks that allow sewage and sulfuric acid gases to escape into the slab or crawlspace, and complete pipe collapse in severe cases.
How inspectors find it: A drain camera inspection (typically $300–$500) reveals the internal condition. Many FL buyers now request a sewer camera inspection as part of due diligence on any home over 30 years old. The camera footage shows inspectors — and buyers — the exact condition in video form.
FL insurance impact: Citizens Insurance added cast iron drain pipe condition to the 4-point inspection form in 2022. Severe deterioration triggers a "required repair" note. While it doesn't automatically deny the policy, buyers' insurance agents will typically require documentation of repair or replacement before binding coverage on a home with failing cast iron.
Impact: Buyer inspection contingency, 4-point insurance note, negotiation leverage for buyer
Solution: Partial liner (trenchless) $2,500–$5,000 or full drain repipe $6,000–$18,000
⚠️ Missing or Dry P-Traps COMMON
A P-trap is the curved section of drain pipe under every sink, tub, and shower that holds water to block sewer gases (including hydrogen sulfide and methane) from entering the home. Missing P-traps are a FPC §404 violation, a health code violation, and a consistent home inspection finding in FL homes.
Common in FL: Seldom-used guest bathrooms and vacation homes frequently have dry P-traps (the water evaporated). Running water for 30 seconds refills them temporarily. More serious is when P-traps are entirely missing — found most often under older sinks where previous owners installed replacement drain baskets incorrectly.
Buyer perception: While not an insurance issue, missing P-traps make buyers wonder what other "shortcuts" were taken in the home — and they're almost always noted in the inspection report, creating a negotiation point.
Impact: Noted in inspection report, sewer gas health issue, buyer negotiation item
Solution: Install P-traps — $150 to $600 depending on access
⚠️ Water Heater Age & Condition COMMON
Florida's 4-point inspection form explicitly asks for the water heater age and condition. Citizens Insurance guidelines: water heaters 10–15 years old may trigger a surcharge; over 15 years, many insurers require replacement before binding the policy or at the next renewal.
FL-specific concern: Florida's hard water (especially in South Florida) deposits calcium scale inside water heaters, significantly reducing effective lifespan. A water heater installed 8 years ago in Miami-Dade may have a reduced remaining life compared to the same unit in a soft-water area. Inspectors note sediment, rust, corrosion at connections, and evidence of past leaks (efflorescence on the floor, rust staining on the pan).
Slab leak risk: Hot water lines running under a concrete slab in FL homes are a known slab leak risk point. Inspectors sometimes note warm spots on tile floors, high water bills, or the sound of running water with all fixtures off — all signs of an active slab leak.
Impact: Insurance surcharge (10 yrs+), potential policy denial (15+ yrs), buyer concern
Solution: Replace before listing — $900 to $1,800. Eliminates a consistent negotiation item.
⚠️ Unpermitted Plumbing Work IMPORTANT
Florida title companies and buyers' attorneys now routinely search county building permit records during due diligence. Unpermitted plumbing additions (bathroom additions, garage conversions with plumbing, kitchen remodels with moved drains, water heater relocations) show up in the permit search and must be disclosed or remediated before closing.
What happens: Title companies may require either (1) a permit close-out inspection with county inspector sign-off or (2) an "as-built" inspection by a licensed contractor with a homeowner warranty. Some buyers simply demand a price reduction equal to the cost of permitting plus risk. In FL, unpermitted work can void a homeowner's insurance policy — creating liability for the seller who did not disclose it.
Impact: Title company hold, buyer price reduction, seller disclosure liability
Solution: Pull after-the-fact permit, schedule county inspection — $500 to $2,000