Industrial VK408 Valve

VK408 Quick-Response Concealed Horizontal Sidewall Sprinkler (model VK408) from Viking Group is a concealed-wall fire sprinkler head designed for sidewall mounting with a 1/2 in. NPT connection. As part of the VK series, VK408 delivers rapid heat response while staying flush with the wall for a discreet installation. The horizontal sidewall orientation enables sprinkler coverage along interior walls in commercial and institutional buildings where ceiling-mounted options are impractical or undesirable. Designed for concealed installation, the VK408 pairs with standard piping and valve assemblies via its 1/2 in. NPT thread, supporting typical fire protection system configurations. Its Quick-Response characteristic helps shorten activation times, contributing to effective protection in corridors, lobbies, and other wall-adjacent spaces where a low-profile head is preferred.