What PEX Fitting Failures Involve
PEX, short for cross-linked polyethylene, is a flexible plastic tubing widely used in modern residential plumbing as a lighter, easier-to-install alternative to copper. PEX systems typically use brass fittings to connect sections of tubing, and litigation across several manufacturers has focused specifically on those brass fittings failing prematurely due to a process called dezincification, where higher-than-normal zinc content in the brass causes it to corrode and weaken when repeatedly exposed to water over time.
A class action settlement addressing this issue specifically for NIBCO brand PEX systems remains active, offering compensation to homeowners who experienced a qualifying leak connected to a defective fitting. This is a different manufacturer and a different, more modern plumbing material than the older polybutylene pipe litigation from the 1990s, and the two should not be confused.
The Settlement and Its Claim Window
Under the NIBCO PEX settlement, homeowners with a qualifying leak generally have 150 days from the date the leak occurs to submit a claim, making it one of the few pipe-related settlements still actively accepting new claims rather than one with a single, fixed historical deadline. This structure exists because PEX fitting failures continue to occur over time as installed systems age, rather than stemming from one discrete historical event.
To file successfully, homeowners generally need to document that the specific fitting involved is a covered NIBCO product, along with evidence of the leak and any resulting damage, such as photographs, plumber assessments, and repair invoices. Given the rolling 150-day window tied to when a leak actually occurs, homeowners with existing NIBCO PEX systems should keep this deadline in mind if a leak happens in the future, rather than assuming a general filing deadline applies.
Other PEX Manufacturers Face Separate Claims
NIBCO is not the only PEX manufacturer that has faced litigation over brass fitting failures linked to dezincification. Other companies, including Uponor, Viega, and Zurn, have faced their own separate lawsuits over similar allegations involving their own fitting products. These are legally distinct matters with their own separate claims processes, settlements, or ongoing litigation, so a fitting failure from one of these other brands would not be covered by the NIBCO settlement.
If you experience a PEX-related plumbing failure, the first step is identifying the specific manufacturer stamped or marked on the fitting itself, since that determines which, if any, settlement or litigation might apply to your situation.
How to Get Legal Help
Confirm your fittings are covered: the settlement applies specifically to certain NIBCO brand PEX plumbing systems, so check your fittings brand and model against the official settlement website before assuming you qualify.
Act quickly after a leak: homeowners generally have 150 days from the date a qualifying leak occurs to submit a claim, one of the tighter windows among pipe-related settlements, so do not delay once damage is discovered.
Document the failure: photograph the failed fitting and any resulting water damage, and keep repair invoices and any plumber assessment identifying the fitting as the cause.
Check other manufacturers separately: PEX litigation also involves other brands like Uponor, Viega, and Zurn, but this particular settlement is specific to NIBCO systems, so confirm which manufacturer fitting failed before filing.
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PEX Class Action Lawsuit: The NIBCO Brass Fitting Settlement: Frequently Asked Questions
Answers to the most common questions about this case and your legal options.
What is the PEX class action lawsuit about?
Litigation over PEX plastic plumbing systems, specifically brass fittings that fail prematurely due to dezincification, a corrosion process linked to elevated zinc content in the brass. A settlement addressing NIBCO brand systems remains active.
How long do I have to file a claim after a leak?
Generally 150 days from the date a qualifying leak occurs under the NIBCO settlement, a rolling window tied to when the failure happens rather than one fixed historical deadline.
Does this settlement cover all PEX pipe brands?
No. This particular settlement is specific to NIBCO brand PEX fittings. Other manufacturers, including Uponor, Viega, and Zurn, have faced their own separate litigation, which would not be covered by the NIBCO settlement.
Is this the same as the polybutylene pipe lawsuit?
No. Polybutylene is an older, different plastic plumbing material from a lawsuit that settled in the 1990s and whose claim window closed long ago. PEX is a distinct, more modern material, and the NIBCO fitting litigation is separate and still active.
What documentation do I need to file a claim?
Evidence that the failed fitting is a covered NIBCO product, along with photographs of the leak and damage, a plumber assessment if available, and repair invoices.