Moreover, we are not persuaded by the contention that a pool liner is an inert, innocuous thing simply because by itself, it is physically incapable of injuring a consumer. To hold otherwise implies that “unreasonably dangerous” under Section 402A requires that the product itself actually exert the injury-causing, physical force. But even dynamite is inert, unless ignited. Although a replacement pool liner does not explode, crush, drive, or exert any other physical force, it may through a chain of not so remarkable events cause serious injuries.
The jury was asked in special interrogatories: “Do you find that the replacement vinyl liner sold by Nichols Swim Pools, Inc. was defective, that is, did it lack any element necessary to make it safe for its reasonably foreseeable use?” The jury answered yes. We hold that as a matter of law Hoffinger is not relieved of a duty to warn.
E.
Open And Obvious Danger
The district court allowed the jury to consider whether the pool liner was defective because it íacked depth markers and warnings about the dangers of diving. Hoffinger contends that the danger associated with diving into a body of water of uncertain depth is open and obvious, in other words, that the axiom “look before you leap” should be the law applicable to this case. We disagree.
A “defective condition” includes the lack of adequate warnings for a product’s safe use. Id. at 478; Berkebile, 337 A.2d at 902. See Thomas v. Arvon Products Co., 424 Pa. 365, 227 A.2d 897, 899 (1967) (failure to warn in a negligence action). If a product is defective absent such a warning, and the defect is a proximate cause of the plaintiff’s „ injury, the manufacturer is strictly liable. Berkebile, 337 A.2d at 902. If, however, the danger is open and obvious, there is no duty to warn. Sherk v. Daisy-Heddon, 285 Pa.Super. 320, 427 A.2d 657, 660 (1981), reversed on other grounds, 498 Pa. 594, 450 A.2d 615 (1982); Ellis v. Chicago Bridge & Iron Co., 376 Pa.Super. 220, 545 A.2d 906, 911 (1988), quoting Sherk, 427 A.2d at 660. See Rice v. Bring, 310 Pa. 550, 165 A. 833, 835 (1933) (no duty to warn of open and obvious danger.in,a negligence action).
Unlike the assumption of the risk-defense, which requires actual subjective knowledge, Berkebile, 337 A.2d at 901; Berman v. Radnor Rolls, Inc., 374 Pa.Super. 118, 542 A.2d 525, 533 (1988), whether a danger is open and obvious is an objective inquiry, not dependent upon the actual knowledge of the user or his actual awareness of the danger. Sherk, 427 A.2d at 661 (1981); Ellis, 545 A.2d at 911, quoting Sherk, 427 Á.2d at 661. We inquire whether knowledge of the danger would be possessed by “the ordinary consumer who purchases [or uses the product], with the ordinary knowledge common to the community as to its characteristics.” Sherk, 427 A.2d at 661, quoting Restatement § 402A, comment (i). For instance, “[i]f the product is one customarily used by children, the danger must be one which children would be likely to recognize and appreciate in order to prevent them from recovering for a product related injury on the grounds that the danger was open and obvious.” Id.
Although prudence mandates that one check the water’s depth, courts gauge the duty to warn not by the “reasonable consumer,” Berkebile, 337 A.2d at 902, but by the “ordinary consumer.” See id. at 899; Lewis v. Duff-Norton Co., 515 Pa. 334, 340, 528 A.2d 590, 593 (1987); Restatement § 402A, comment (i). Unlike the law of negligence, product liability laws do not impose a duty upon the consumer; they instead encourage manufacturers to make safe products even for the careless and unreasonable consumer. “A plaintiff cannot be precluded from recovery in a strict liability case because of his own negligence.” Berkebile, 337 A.2d at 901. The inquiry is whether the product is defective for ordinary use and foreseeable misuse.
It is clearly foreseeable that consumers, children and adults alike, would dive into a pool of unknown depth., Indeed, there was testimony that previous owners of this pool