King County V. Aquatherm Gmbh

CourtCourt of Appeals of Washington
DecidedFebruary 2, 2026
Docket85572-7
StatusUnpublished

This text of King County V. Aquatherm Gmbh (King County V. Aquatherm Gmbh) is published on Counsel Stack Legal Research, covering Court of Appeals of Washington primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
King County V. Aquatherm Gmbh, (Wash. Ct. App. 2026).

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COUNTY, a Washington municipal corporation, No. 85572-7-I (consolidated with No. 85595-6-I) Respondent, DIVISION ONE v. UNPUBLISHED OPINION AQUATHERM GMBH, a German entity,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 No. 85572-7-I (consol. with No. 85595-6-I)/2

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.

-2- No. 85572-7-I (consol. with No. 85595-6-I)/3

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.

-3- No. 85572-7-I (consol. with No. 85595-6-I)/4

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.

-4- No. 85572-7-I (consol. with No. 85595-6-I)/5

Aquatherm appeals.

II

Aquatherm first argues that the trial court lacked personal jurisdiction over

Aquatherm.

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.

From January 2011 to December 2015, Aquatherm was in an exclusive

distribution agreement with Aetna NA L.C. f/k/a Aquatherm NA. In December 2015,

Aquatherm LP became the exclusive distributor of Aquatherm pipe in North America

and remained as the exclusive distributor at the time of all related proceedings.

The trial court found that Aquatherm marketed and sold pipe through a

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