Offered in 165°F and 205°F temperature ratings, Model VK514 is UL-Listed to provide ceiling-only protection for storage up to 43 ft in warehouses with ceilings as high as 48 ft, without use of in-rack sprinklers. Pendent sprinkler is also UL Listed for aisle widths as narrow as 6 ft and approved to protect Class I-IV commodities. Featuring 1 in. NPT or 25 mm BSP thread size, unit has large K factor of 28.0, which results in pressure requirement of 35 psi.