Single Interlock Preaction Valve

The Single Interlock Preaction Valve is the control valve at the core of a single interlock preaction sprinkler system a system that requires one confirmed detection event to open the valve and allow water to fill the dry sprinkler piping, followed by individual sprinkler head activation to discharge water into the protected space. This single-confirmation approach provides a faster response than double interlock systems while still offering greater protection against accidental discharge than a standard wet pipe system. Viking single interlock preaction valves are engineered for reliable, repeatable performance with minimal maintenance requirements, and are compatible with a wide range of electrical and pneumatic detection systems. Compliant with NFPA 13 and carrying UL and FM approvals, they are widely used in data centers, telecommunications rooms, and other sensitive facilities.