When used with the Model VK697 Attic Upright sprinkler, it is possible to use a 3 branch line design for spans up to 80 ft. (24,4 m) and a 5 branch line design for spans greater than 80 ft. (24,4 m) and up to 100 ft. (30,5 m).
The VK690 and VK697 used together allow for flows as low as 20 gallons per minute and a minimum operating pressure of 13 psi.
Can be installed with either steel or CPVC piping (CPVC for wet pipe systems only).
Listed for specific pitches 2-1/2:12 ≤ 6:12, and spans 80 ft. and 100 ft.
Available in a 200°F (93.3°C) intermediate temperature rating.