Manufacturers are strictly liable in a products liability claim for an injury proximately caused by a “defect in construction”.[1] Unlike a design defect or failure to warn, a manufacturing defect is a defect in the construction of the particular product rather than the entire product line.
Although the injury victim does not need to prove negligence the injury victim must show that a manufacturing defect caused the injury. This will often require the use of expert testimony.
[1] RCW 7.72.030.