Warren Pumps Asbestos Exposure and Mesothelioma Claims

By David Meldofsky, California-licensed attorney · Founder, Lawsuit Informer

Last updated: September 6, 2026

If you spent time in a ship's engine room or a plant's pump house, you may have worked on Warren pumps without ever learning the name. They were sealed with asbestos gaskets and asbestos rope packing. Taking those parts off and putting new ones on released dust, and people who did that work have been diagnosed with mesothelioma decades later. Warren Pumps has been named in asbestos lawsuits for many years, and this page explains how that exposure happened and how these claims work.

Important:

This page provides general educational information about Warren Pumps asbestos litigation and does not constitute medical or legal advice. Allegations described here reflect claims made in litigation.

Key Takeaways:

Warren Pumps has never filed for bankruptcy and never set up an asbestos trust fund. Claims are lawsuits, and Warren Pumps LLC is the name that appears as defendant.
The exposure usually involved asbestos gaskets and shaft packing that had to be scraped out and replaced during pump maintenance.
Navy machinist's mates, boiler technicians, shipyard workers, and plant maintenance crews come up most often in these cases.
Money in Warren cases comes partly from insurance policies bought decades ago by owners who no longer run the business.

Company Background

Warren built its name on marine pumps. Its steam-driven pumps, and later its centrifugal designs, handled feedwater, condensate, bilge, ballast, and fire main service on Navy and commercial ships. The same designs ran in power plants and factories on land. Pumps like these last a long time and get rebuilt many times, so a unit installed in one decade was often still being serviced two or three decades later.

The Navy connection matters for a practical reason. Shipboard maintenance is unusually well documented. Vessel records, machinery histories, and testimony from shipmates can place a specific piece of equipment in a specific space during someone's service. That kind of proof is what these cases turn on.

Who Owns Warren Pumps Today

The company began in 1897 as the Warren Steam Pump Company, in the town of Warren, Massachusetts. It carried that name and stayed in that town for most of a century. Ownership changed hands several times after that. Imo Industries bought Warren in 1989. The business later sat inside Colfax Corporation, and in December 2017 Colfax sold its entire fluid handling group to CIRCOR International. Warren was one of the pump brands named in that sale.

This history has a direct effect on how a case is built. The name on the lawsuit is Warren Pumps LLC, not whichever parent company owns it in a given year. Selling a business does not erase liability that attached to it decades earlier. Figuring out which entity to name, and which old insurance policies sit behind that entity, is ordinary work in asbestos cases. Our guide to asbestos defendant successor companies explains how that tracing is done.

How Asbestos Exposure Happened Around Warren Pumps

The exposure story is the same one told about other industrial pumps. Warren pumps moved hot fluids, so they needed heat-resistant gaskets where the casing bolted together and rope-like packing around the turning shaft. For decades those parts commonly contained asbestos, whether they came with the pump or went in during a later overhaul.

Maintenance meant scraping baked-on gasket material off metal faces, digging spent packing out of the stuffing box, and cutting new pieces to fit, sometimes from asbestos sheet. All of that made dust. Aboard ship it happened in engine rooms and fire rooms with little ventilation. At shipyards, overhauls put machinists, pipefitters, and laborers around the same parts. For the wider picture, see asbestos exposure from industrial valves, pumps, and gaskets.

Jobs and Sites Often Involved

Navy machinist's mates and boiler technicians who maintained shipboard pumps
Shipyard machinists, pipefitters, and laborers performing overhauls
Merchant marine engine room crews
Power plant and industrial facility maintenance workers
Pump repair shop workers who rebuilt units off site
Millwrights servicing pumps during plant outages

Who Actually Pays a Warren Pumps Claim

Many asbestos companies went bankrupt and set up trust funds. Those trusts take claim forms and pay a set percentage. Warren did not go that route, so there is no trust to file with and no schedule of payments to look up.

Money in Warren cases comes from the company and from insurance policies written decades ago, including policies bought by owners who no longer have anything to do with the business. Whether Warren could actually reach that older coverage became its own court fight. In October 2009 the Delaware Court of Chancery ruled that Warren was entitled to excess insurance a former owner had purchased. The court also applied what is called an "all sums" approach, which let Warren collect what it paid on a claim from any insurer whose policy was triggered, up to that policy's limit.

For someone reading this page, the takeaway is straightforward. A Warren claim is a lawsuit and it moves on a court's calendar, not a claims administrator's. It is also normal for one person's case to involve both a lawsuit against a company like Warren and separate claims to asbestos trust funds set up by bankrupt manufacturers, because most people were exposed to many products over a working life.

Warren Pumps in Asbestos Litigation

Warren Pumps has been a regular defendant in asbestos cases for decades, especially cases coming out of Navy and maritime service. Resolved cases are paid through settlements and, less often, trial verdicts.

One question comes up again and again in Navy pump cases: who is responsible when the asbestos part was made by a different company. Equipment makers argued they should not answer for gaskets and packing that someone else supplied. In 2019 the United States Supreme Court decided a maritime case and held that a manufacturer can have a duty to warn when its product requires asbestos parts to work as intended and the manufacturer knows the combination is likely to be dangerous. That ruling is one reason service records and product identification carry so much weight in these claims.

Illnesses Discussed in These Cases

Mesothelioma
Asbestos-related lung cancer
Asbestosis
Other asbestos-related conditions examined in litigation

Asbestos diseases take a long time to appear, often 10 to 50 years between exposure and diagnosis. That is why claims filed today so often involve work done in the 1960s, 1970s, or 1980s. See how asbestos exposure is proven decades later and asbestos claim deadlines after symptoms appear.

Records That Help Support a Warren Pumps Claim

Because there is no trust process here, the evidence carries the case. Service records and ship assignments, machinery and overhaul histories, union and employment records, testimony from shipmates and co-workers, and medical records tying the diagnosis together all matter. Our guide to asbestos records that help support a claim goes through each of these.

Frequently Asked Questions

Is there a Warren Pumps asbestos trust fund?

No. Warren Pumps has never filed for bankruptcy or established an asbestos trust fund. Claims involving Warren equipment go through the court system as lawsuits, and Warren Pumps LLC remains the entity that appears as a defendant.

Who owns Warren Pumps now?

Warren started as the Warren Steam Pump Company in 1897 and has changed owners several times. Imo Industries bought it in 1989, the business later sat inside Colfax Corporation, and Colfax sold its fluid handling group to CIRCOR International in December 2017. The lawsuits still name Warren Pumps LLC, because a sale does not move older liability off the company it attached to.

Why do so many Warren Pumps cases involve the Navy?

Warren supplied pumps to the United States Navy for a long time, and those pumps ran in engine rooms and fire rooms aboard many vessels. Sailors who maintained them, and shipyard workers who overhauled them, describe gasket and packing work in tight machinery spaces. That is why Navy service histories show up so often in these claims.

Can I still bring a claim if my Navy service was decades ago?

Deadlines for asbestos claims generally run from the date of diagnosis rather than the date of exposure, though the rules vary by state, and veterans may also have separate VA benefit questions. Whether a particular deadline has passed depends on the specific facts, which is why a situation is worth having reviewed rather than assumed.

Diagnosed with mesothelioma, asbestos-related lung cancer, or asbestosis? Filing deadlines often begin from the date of diagnosis, not exposure. See if your situation may qualify with a free, no-obligation case review.

See If Your Situation May Qualify

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Sources

Figures and dates above should be confirmed against the original sources.

Related Asbestos Guides

About the Author

David Meldofsky is a California-licensed attorney and the founder of Lawsuit Informer, an educational platform focused on helping people understand lawsuits, consumer safety issues, and legal rights related to defective products and toxic exposures.

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Last Updated: September 6, 2026

Educational information only. Not legal advice. No attorney-client relationship is formed.