Section 7.72.060 - Length of time product sellers are subject to liability(1) Useful safe life. (a) Except as provided in subsection (1)(b) hereof, a product seller shall not be subject to liability to a claimant for harm under this chapter if the product seller proves by a preponderance of the evidence that the harm was caused after the product's "useful safe life" had expired. "Useful safe life" begins at the time of delivery of the product and extends for the time during which the product would normally be likely to perform or be stored in a safe manner. For the purposes of this chapter, "time of delivery" means the time of delivery of a product to its first purchaser or lessee who was not engaged in the business of either selling such products or using them as component parts of another product to be sold. In the case of a product which has been remanufactured by a manufacturer, "time of delivery" means the time of delivery of the remanufactured product to its first purchaser or lessee who was not engaged in the business of either selling such products or using them as component parts of another product to be sold.
(b) A product seller may be subject to liability for harm caused by a product used beyond its useful safe life, if: (i) The product seller has warranted that the product may be utilized safely for such longer period; or(ii) The product seller intentionally misrepresents facts about its product, or intentionally conceals information about it, and that conduct was a proximate cause of the claimant's harm; or(iii) The harm was caused by exposure to a defective product, which exposure first occurred within the useful safe life of the product, even though the harm did not manifest itself until after the useful safe life had expired.(2) Presumption regarding useful safe life. If the harm was caused more than twelve years after the time of delivery, a presumption arises that the harm was caused after the useful safe life had expired. This presumption may only be rebutted by a preponderance of the evidence.(3) Statute of limitation. Subject to the applicable provisions of chapter 4.16 RCW pertaining to the tolling and extension of any statute of limitation, no claim under this chapter may be brought more than three years from the time the claimant discovered or in the exercise of due diligence should have discovered the harm and its cause.