Assertion: fire sprinkler | /r/HasAspect | senju’s zn-qr model sprinklers
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text: The most common pendent fire sprinkler has a 1/2" (12.7 mm) thread connection and a 5.6 K-factor, like those found in Viking’s VK302 and VK102, Tyco’s TY-B family of sprinklers, Victaulic's V27 FireLock, and Senju’s ZN-QR model sprinklers.