Viking® VK2543, Standard, Dry Sprinkler, 8.0K, Horizontal Sidewall, SR, 1” NPT, Recessed Adjustable, White, 155 Degree, 12” Length, 21481UMB/W12 Fire Sprinkler Head 818G continuous (can also use as

continuous (can also use as an annunciator)

Inside Diameter - 2 5/8"

57-591-0-155

Item: Tyco® TY8220

Reliable Performance:  The OSY2 is equipped with tamperresistant cover screws to prevent unauthorized entry

Viking® VK2543, Standard, Dry Sprinkler, 8.0K, Horizontal Sidewall, SR, 1” NPT, Recessed Adjustable, White, 155 Degree, 12” Length, 21481UMB/W12 Fire Sprinkler Head 818G continuous (can also use asViking VK2543, Standard, Dry Sprinkler, 8. 0K, Horizontal Sidewall, SR, 1 NPT, Recessed Adjustable, White, 155 Degree, 12 Length, 21481UMB W12 Fire Sprinkler Head Viking Standard Response Ordinary Hazard Dry Horizontal Sidewall Sprinklers are thermosensitive spray sprinklers suitable for use in areas subject to freezing. The sprinklers are designed for dry systems and preaction systems where it is necessary to prevent water or condensation from