Viking Freedom® Residential Pendent Lead Free* Sprinkler VK4680 is a small, thermosensitive, glass bulb residential sprinkler available in Brass, Chrome or White-Polyester and 155 °F (68 °C) and 175 °F (79 °C) temperature ratings. The orifice design, with a K-Factor of 4.9 (70.6 metric), allows efficient use of available water supplies for the hydraulically designed fire-protection system. The glass bulb operating element and special deflector characteristics meet the challenges of residential sprinkler standards. Lead content complies with the definition of ‘Lead Free’ established in the Reduction of Lead in Drinking Water Act (S.3874) endorsed by AWWA’s Water Utility Council and California Assembly Bill #1953.