The Viking Corporation announced the release of the new VK4621 and VK4921 quick response and standard response concealed pendent sprinklers with a K-factor of 5.6 (80.6). The new commercial sprinklers are designed for installation on concealed pipe systems where the appearance of a smooth ceiling is desired. In addition to the new sprinklers, Viking has announced a durable and lightweight installation wrench and protective cap removal tool. “The installation process is significantly improved with our new VK4621,” said Martin Workman, Vice President of Product Management at Viking. “The new plastic wrench allows for installation with the protective cap in place, minimizing damage to the sprinkler during installation. The protective cap is designed to withstand rough usage and protects the sprinkler from overspray. We also offer a cap removal tool to help you finish the job from the ground.” Quick response sprinkler The new VK4621 sprinkler serves as a straight replacement for Viking’s VK462 sprinkler. The VK4621 is cULus Listed as a quick response sprinkler and FM Approved as a standard response sprinkler. Also available is the UL Listed and FM Approved VK4921, a standard response 5.6 K-factor concealed pendent sprinkler, which will replace the existing VK492. Available in brass and Electroless Nickel PTFE (ENT) coating for environments in which corrosion is more likely to occur, the VK4621 and VK4921 are available at 155°F (68°C), 175°F (79°C) and 200°F (93°C) temperature ratings and have a maximum working pressure of 250 psi under the UL Listings.