MESOTHELIOMA | 2026-10-10

O’Neil v. Crane Co. and the Limits of Asbestos Liability: When a California Manufacturer Is — and Isn’t — Responsible for Another Company’s Asbestos

A valve or pump maker whose own product contained no asbestos is often sued because asbestos insulation or gaskets made by others were used with it. In O’Neil v. Crane Co., the California Supreme Court drew the line: generally, a manufacturer is not liable for asbestos in products it did not make or supply — but there are important exceptions.

A recurring question in California asbestos litigation is whether a company that made a pump, valve, or piece of equipment can be liable for mesothelioma caused by asbestos-containing insulation, gaskets, or packing that someone else manufactured — even when the company’s own product contained no as

Asbestos litigation often targets the makers of durable industrial equipment — pumps, valves, turbines, boilers — because that equipment was used for decades in environments thick with asbestos. But much of the asbestos a worker actually encountered came not from the equipment itself but from insulation wrapped around it, gaskets sealing it, or packing inside it, frequently manufactured by other companies and often replaced many times over the equipment's life. The legal question is whether the equipment maker answers for asbestos it never made. California's answer, from O'Neil v. Crane Co., is nuanced, and getting it right determines which defendants can be held accountable.

The Problem O'Neil Addressed

By the time many asbestos cases are filed, the companies that actually made the asbestos — the insulation and gasket manufacturers — are often bankrupt, dissolved, or otherwise beyond reach. Plaintiffs' attention therefore turned to solvent equipment makers whose products were used alongside asbestos. The theory was that these manufacturers should be liable because it was foreseeable that their equipment would be used with asbestos-containing components. O'Neil v. Crane Co. tested that theory. The case involved Navy equipment — pumps and valves — used with external asbestos insulation and internal asbestos gaskets and packing that the defendants did not manufacture or supply. The plaintiff's family argued the equipment makers should be liable because asbestos use with their products was foreseeable and even necessary. The Supreme Court rejected that broad theory.

The General Rule: No Liability for Another's Asbestos

O'Neil held that, as a general matter, a product manufacturer may not be held liable in strict liability or negligence for harm caused by another manufacturer's product — including asbestos-containing replacement parts and materials — that the defendant did not make, sell, or supply. The Court was explicit that a manufacturer is not strictly liable for harm caused by products it did not produce, and that the mere foreseeability that its product might be used in conjunction with a dangerous asbestos-containing product made by someone else is not enough to impose liability. The Court reasoned that extending liability to every product used near or with a dangerous component would have no logical stopping point and would make manufacturers insurers of other companies' products. For equipment makers whose own products were asbestos-free, O'Neil provides a significant defense: a plaintiff generally cannot recover from them for asbestos that originated elsewhere.

The Exceptions That Keep Manufacturers in the Case

O'Neil did not immunize equipment makers across the board. The Court recognized that liability may still attach in defined circumstances. A manufacturer may be liable where its own product contained asbestos that contributed to the harm — for instance, where the equipment was sold with asbestos components or asbestos was an original part of the product as supplied. Liability may also attach where the defendant's product required the use of the asbestos-containing product to function, or where the asbestos-containing material was necessary to the product's operation such that its use was not merely foreseeable but effectively compelled by the design. In other words, if the manufacturer's own product was a substantial factor through its own asbestos content, or if it was designed in a way that required asbestos to work, the O'Neil general rule may not protect it. These exceptions are where much of the litigation now focuses: plaintiffs develop evidence that the equipment was supplied with asbestos parts or could not function without them, while defendants argue the asbestos came entirely from third-party replacements.

How O'Neil Fits With California Causation Law

O'Neil defines whether a particular defendant can be liable at all for another's asbestos. Separately, a plaintiff must still prove causation against any defendant that remains in the case. Under Rutherford v. Owens-Illinois, Inc. (1997) 16 Cal.4th 953, the plaintiff must show that exposure to the defendant's asbestos-containing product was a substantial factor in contributing to the risk of developing mesothelioma — a standard we explain in our article on Rutherford and substantial-factor causation. The two doctrines work in sequence: O'Neil asks whether the defendant is responsible for the asbestos at issue, and Rutherford asks whether exposure to that defendant's asbestos was a substantial factor in the disease. California product-defect tests, including the consumer-expectations approach we discuss in our article on the consumer-expectations test in asbestos cases, govern defendants whose own products are at issue. A complete asbestos case keeps all three layers in mind.

The Overlap With the Government-Contractor Defense

In Navy and military cases, O'Neil often appears alongside the federal government-contractor defense from Boyle v. United Technologies and the maritime duty-to-warn principles of Air & Liquid Systems Corp. v. DeVries, which we examine in our article on the government-contractor defense in Navy asbestos cases. The doctrines address different questions: O'Neil (a California rule) concerns whether a manufacturer is responsible for another's asbestos; Boyle (a federal defense) concerns whether military specifications displace state tort liability; and DeVries (federal maritime law) concerns a manufacturer's duty to warn about dangerous parts its product requires. Because the same pumps, valves, and gaskets recur in Navy cases, a defendant may invoke several of these doctrines at once, and a plaintiff must be prepared to address each. Which body of law ultimately governs can depend on the forum — state court or federal court after removal — and on the specific facts of the equipment and its asbestos components.

Why the Equipment-Maker Question Still Matters

Some observers assumed O'Neil would largely end asbestos claims against equipment makers. It did not. The decision narrowed a broad foreseeability theory, but its exceptions preserve liability for manufacturers whose own products contained asbestos or required it to function — categories that cover a great deal of mid-century industrial equipment originally supplied with asbestos gaskets, packing, and insulation. The practical consequence is that the outcome against a given defendant turns on detailed, historical facts: What did this manufacturer's product contain when it was originally sold? Was asbestos an integral, supplied component? Did the product require asbestos to operate safely? Could it function with a non-asbestos alternative? These questions are answered through old product specifications, sales records, engineering documents, and expert testimony — the same kind of historical record that drives Navy asbestos litigation generally. A victim should not assume that an equipment maker is automatically off the hook because its catalog later offered asbestos-free versions; what matters is what the specific product at issue contained and required.

The Raw-Material and Bulk-Supplier Context

O'Neil's reasoning connects to a broader set of California doctrines about how far up and down the supply chain liability runs. Suppliers of raw asbestos fiber and bulk materials, manufacturers of finished asbestos products, equipment makers whose products used those products, and the employers and premises owners where exposure occurred each occupy different positions. California's component-parts and raw-material principles generally limit the liability of a supplier of a multi-use raw material or component for harm arising from the finished product into which it is integrated, absent participation in the design or specific knowledge directed to the use. O'Neil applied a related logic to equipment makers, declining to hold them liable for the asbestos content of separate products used with their equipment. The practical effect is that liability tends to concentrate on the parties closest to the specific asbestos that injured the worker — the maker or supplier of that asbestos-containing material, or an equipment maker whose own product contained or required it. Mapping each defendant's true position in the chain, rather than assuming any company near the asbestos is liable, is central to building a case that survives an O'Neil defense.

Take-Home and Secondary Exposure

Asbestos does not injure only the workers who handled it. Family members exposed to fibers carried home on a worker's clothing, hair, and body have developed mesothelioma decades later — so-called "take-home" or secondary exposure. California addressed this in Kesner v. Superior Court (2016) 1 Cal.5th 1132, where the Supreme Court held that an employer or premises owner whose operations use asbestos owes a duty of care to members of a worker's household who are foreseeably exposed to asbestos carried home on the worker, because such secondary exposure is a reasonably foreseeable consequence of the failure to control asbestos. Kesner is distinct from O'Neil — it concerns the scope of the duty owed to household members, not whether a manufacturer is liable for another's asbestos — but the two together illustrate how California calibrates asbestos liability: broadly enough to reach foreseeable victims like exposed family members, but not so broadly as to make every company that operated near asbestos an insurer of products it never made. For a family confronting a take-home mesothelioma diagnosis, Kesner opens a path to recovery that O'Neil's limits on manufacturer liability do not foreclose, because the responsible parties and theories are different.

Pursuing the Full Range of Responsible Parties

Because O'Neil can remove some equipment makers while leaving others in, a thorough asbestos case casts a wide, carefully documented net. That means identifying every product the victim was exposed to and every company that made or supplied asbestos-containing materials — insulation, gaskets, packing, cement, textiles, and friction products — not just the most visible equipment. It also means pursuing recovery from asbestos bankruptcy trusts, which were established by manufacturers that went bankrupt under asbestos liability and which pay claims according to published criteria, independent of any court judgment. Many victims recover from a combination of solvent defendants in litigation and multiple bankruptcy trusts. The O'Neil analysis helps focus the litigation on the defendants who can properly be held responsible, while the trust system captures recovery from those that are no longer solvent. Together, they are how a seriously injured mesothelioma victim is made as whole as the law allows.

What California Mesothelioma Victims Should Do

If you or a loved one has been diagnosed with mesothelioma, the O'Neil framework underscores why a detailed exposure history is so important. The identity and original composition of each product you worked with — and whether asbestos was built into it or added by others — can determine which companies are liable. Mesothelioma cases are also time-sensitive: the disease is aggressive, and California offers trial-preference procedures that let seriously ill plaintiffs reach trial quickly so that justice is not delayed past a victim's lifetime. Acting promptly, with counsel experienced in the interplay of O'Neil, Rutherford, and the government-contractor doctrines, ensures that every properly responsible defendant and every available bankruptcy trust is pursued. The law is nuanced, but a well-prepared victim can hold the right parties accountable.

Finally, the compensation at stake in a mesothelioma case reflects the gravity of the disease. Recoverable damages typically include past and future medical expenses for a cancer that often requires surgery, chemotherapy, and palliative care; lost income and lost earning capacity; and substantial non-economic damages for the pain, suffering, and shortened life expectancy the disease imposes. In a wrongful-death case, surviving family members may recover for the loss of their loved one's support, companionship, and guidance. Because mesothelioma is almost always fatal and progresses quickly, the timing of the case matters not only for the statute of limitations but for the victim's ability to participate — to give testimony, to be heard, and to see a measure of justice within their lifetime. The O'Neil framework ensures that the defendants pursued are the ones the law properly holds responsible, so that the recovery stands up rather than collapsing on a manufacturer's valid defense. That combination — the right defendants and a timely case — is what allows a mesothelioma victim and family to obtain full and durable compensation. It is also why an early, expert-guided reconstruction of the victim's work and exposure history is not a formality but the single most important investment in the case, because that history is what identifies the responsible parties and defeats the defenses before them.

Frequently Asked Questions

What did O'Neil v. Crane Co. decide?

In O'Neil v. Crane Co. (2012) 53 Cal.4th 335, the California Supreme Court held that a product manufacturer is generally not liable in strict liability or negligence for harm caused by asbestos-containing products it did not make, sell, or supply — even if it was foreseeable that its product would be used with such asbestos products.

Does O'Neil mean equipment makers are never liable for asbestos?

No. O'Neil recognized exceptions. A manufacturer may still be liable where its own product contained asbestos that contributed to the harm, or where the product required or made necessary the use of the asbestos-containing material to function. These exceptions keep many equipment makers in asbestos cases.

Why were equipment makers sued for others' asbestos in the first place?

Because the companies that actually made the asbestos insulation and gaskets are often bankrupt or dissolved, plaintiffs turned to solvent equipment makers, arguing it was foreseeable their products would be used with asbestos. O'Neil rejected that broad foreseeability theory while preserving the exceptions above.

How does O'Neil relate to proving causation?

They are separate questions. O'Neil decides whether a defendant can be liable for the asbestos at issue; Rutherford v. Owens-Illinois then requires proof that exposure to that defendant's asbestos was a substantial factor in contributing to the risk of mesothelioma. A plaintiff must satisfy both.

How does this fit with Navy asbestos cases?

In Navy cases, O'Neil often appears alongside the federal government-contractor defense (Boyle) and maritime duty-to-warn law (DeVries). They address different questions, and a defendant may raise several at once. Which governs can depend on whether the case is in state or federal court and on the equipment's specific facts.

What facts determine whether a manufacturer is liable under O'Neil?

What the specific product contained when originally sold, whether asbestos was an integral supplied component, whether the product required asbestos to operate safely, and whether a non-asbestos alternative existed. These are proven through old specifications, sales and engineering records, and expert testimony.

Can I still recover if the asbestos makers are bankrupt?

Often yes. Asbestos bankruptcy trusts, funded by manufacturers that went bankrupt under asbestos liability, pay claims according to published criteria independent of any court judgment. Many victims recover from a combination of solvent defendants and multiple trusts.

What should I do after a mesothelioma diagnosis?

Act promptly and preserve a detailed exposure history — the products you worked with and their makeup drive the O'Neil analysis. California offers trial-preference procedures for seriously ill plaintiffs. Experienced counsel can pursue every responsible defendant and trust. Call Trembach Law Firm at (213) 645-2246.

Talk to a California Mesothelioma Lawyer About Equipment-Maker Liability

O'Neil v. Crane Co. narrowed asbestos liability for some equipment makers but left important exceptions intact — and whether a given manufacturer is responsible turns on detailed facts about its specific product. Trembach Law Firm, led by Anatolii Trembach (admitted in California), analyzes liability under O'Neil and its exceptions, proves causation under Rutherford, and pursues every responsible defendant and available bankruptcy trust so that mesothelioma victims and their families recover what the law allows. Call (213) 645-2246 for a free, confidential consultation.

Contact Trembach Law Firm at (818) 514-7680 for a confidential consultation.

Trembach Law Firm | 27001 Agoura Road, Suite 350, Calabasas, CA 91301