King County V. Aquatherm Gmbh

Court of Appeals of Washington·Decided March 23, 2026·No. 85572-7·Published

Opinion

IN THE COURT OF APPEALS OF THE STATE OF WASHINGTON

KING COUNTY, a Washington municipal corporation, No. 85572-7-I (consolidated with No. 85595-6-I)

Respondent,

DIVISION ONE

v.

ORDER GRANTING

AQUATHERM GMBH, a German MOTION TO PUBLISH entity,

Appellant,

and

AQUATHERM L.P., a Delaware limited partnership; AETNA NA L.C. f/k/a AQUATHERM NA L.C., a Utah limited liability company, AQUATHERM INC., a Utah corporation, RIDGELINE MECHANICAL SALES, LLC, a Montana limited liability company, HARRINGTON INDUSTRIAL PLASTICS, INC., a Delaware limited liability company, WOOD HARBINGER INC., a Washington corporation, WG CLARK CONSTRUCTION CO., a Washington corporation, and AUBURN MECHANICAL INC., a Washington corporation,

Defendants.

Appellant Aquatherm GmbH (Aquatherm) moved to publish the court’s opinion filed on February 2, 2026. Appellant Anne Cohen joined Aquatherm’s motion to publish.

Respondent King County filed an answer to the motion to publish and Aquatherm filed a reply.

The court has determined that the motion should be granted. Therefore, it is ORDERED that appellant’s motion to publish the opinion is granted.

FOR THE COURT:

IN THE COURT OF APPEALS OF THE STATE OF WASHINGTON

KING COUNTY, a Washington municipal corporation, No. 85572-7-I (consolidated with No. 85595-6-I)

Respondent,

DIVISION ONE

v.

PUBLISHED OPINION

AQUATHERM GMBH, a German entity,

Appellant,

and

AQUATHERM L.P., a Delaware limited partnership; AETNA NA L.C. f/k/a AQUATHERM NA L.C., a Utah limited liability company, AQUATHERM INC., a Utah corporation, RIDGELINE MECHANICAL SALES, LLC, a Montana limited liability company, HARRINGTON INDUSTRIAL PLASTICS, INC., a Delaware limited liability company, WOOD HARBINGER INC., a Washington corporation, WG CLARK CONSTRUCTION CO., a Washington corporation, and AUBURN MECHANICAL INC., a Washington corporation,

Defendants.

MANN, J. — King County sued Aquatherm GmbH (Aquatherm) and others alleging that Aquatherm’s green polypropylene pipe installed at the King County

Correctional Facility (KCCF), was defective. The complaint asserted violations of the Washington Product Liability Act (WPLA), ch. 7.72 RCW; the Consumer Protection Act (CPA), ch. 19.86 RCW; and a claim for breach of warranties. After a six-week trial, a jury awarded the County over $18 million.

Aquatherm appeals and challenges the trial court’s rulings on personal jurisdiction and various discovery sanction orders. Aquatherm also argues that the trial court was biased. We affirm.

I

A

The County owns the KCCF located on 5th Avenue in Seattle. The KCCF regularly houses over 1,000 people. In 2008, the County determined that it needed to replace the domestic potable water pipes at the KCCF because of ongoing failures.

The County selected Aquatherm pipe for the project based on Aquatherm’s representation about the pipe’s suitability for the facility. Aquatherm pipe is manufactured by Aquatherm, a company located in Germany. Aquatherm pipe had been installed at other locations in Washington, including Swedish Hospital, the Via6 apartments at Sixth and Lenora, the Fred Hutchinson Building, and Virginia Mason Hospital.

Between 2011 and 2013, the County installed nearly six miles of Aquatherm pipe at the KCCF. Soon after the installation was completed, the pipes began to fail. Unknown to the County at the time, Aquatherm pipe had been experiencing failures around the world, including in Australia, Canada, and the Via6 apartments in Seattle. The County worked with Aquatherm to repair the ongoing and increasing pipe failures.

In 2019, the County retained Dr. Bryan Templeton, a metallurgist and materials engineer, to investigate the failures. Dr. Templeton determined that the failures were due to copper-catalyzed oxidation of the Aquatherm pipe. The County determined that all of the Aquatherm pipe was susceptible to failure. The County decided to perform an emergency repipe project to replace all of the Aquatherm pipe.

B

In March 2019, the County sued Aquatherm, several U.S. Aquatherm partners and distributors, and designers and contractors involved in the project. The lawsuit was filed in King County Superior Court and alleged violations of the WPLA, CPA, and breach of warranties. 1 Aquatherm moved to dismiss the County’s complaint for lack of personal jurisdiction in October 2019. The trial court denied Aquatherm’s motion to dismiss without prejudice after determining that the facts alleged in the County’s complaint satisfied its pleading burden under CR 12(b)(2). The court’s order allowed Aquatherm to bring a future challenge to personal jurisdiction after February 3, 2020.

On April 11, 2023, less than a month before trial was set to begin, Aquatherm renewed its challenge to personal jurisdiction and moved for an evidentiary hearing on the issue. The trial court determined that because the evidence to be presented at trial would be duplicative of the evidence at an evidentiary hearing, it would conduct a bench trial on personal jurisdiction during the jury trial. The trial court ultimately determined that it had personal jurisdiction.

1 The County’s claims against the non-Aquatherm entities settled before trial.

Additionally, the trial court found on two occasions that Aquatherm engaged in discovery violations and entered sanction orders. The first discovery sanction concerned Aquatherm’s failure to disclose the existence of a second recipe used in the Aquatherm pipe installed at the KCCF. In a parallel proceeding being litigated in King County concerning Aquatherm pipe failures at the Via6 apartments, Aquatherm offered testimony that there was only one recipe used for its plastic pipe sold in the United States and told the County in this case to rely on that testimony. The County eventually learned of the existence of a second recipe used in the pipe at the KCCF. The trial court concluded that Aquatherm violated the discovery rules by failing to disclose the second recipe, which the trial court concluded was willful and substantially prejudicial to the County. The court considered various sanctions but ultimately ordered that certain facts were deemed established and personally sanctioned one of Aquatherm’s attorneys, Anne Cohen, $18,000.

Then, on the second to last day of testimony, one of Aquatherm’s witnesses testified that it maintained samples of the pipe installed at the KCCF, which was not produced during discovery. The trial court found that Aquatherm engaged in another discovery violation and sanctioned Aquatherm $1.5 million. The court also personally sanctioned Cohen $5,000.

After a six-week trial, on June 29, 2023, the jury returned a verdict for the County finding that Aquatherm violated the WPLA and CPA. The jury awarded the County $18,063,850. The jury found for Aquatherm on the County’s breach of warranties claim. On July 17, 2023, the trial court entered findings of fact and conclusions of law finding specific personal jurisdiction over Aquatherm.

Aquatherm appeals.

II

Aquatherm first argues that the trial court lacked personal jurisdiction over Aquatherm.

A

We begin by summarizing the trial court’s findings of fact and conclusions of law addressing personal jurisdiction.

Aquatherm is the sole manufacturer of Aquatherm pipe and is headquartered in Attendorn, Germany. It is not domiciled or registered to do business in Washington and does not own or lease any real property in Washington.

The trial court found that Aquatherm formed and partnered with several U.S.

entities to facilitate the sale of Aquatherm pipe. For example, in 2007, Aquatherm partnered with Aquatherm Inc., a Utah corporation, to expand its sales of Aquatherm pipe to the United States. Under the exclusive distribution agreement, Aquatherm assigned to Aquatherm Inc. the exclusive right to distribution of Aquatherm pipe throughout North America.

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