TRIMPAC® Model B-3 & B-3B is a factory assembled trim package for a single interlocked preaction system with electric release module in a metal enclosure. The standard trim normally required on a deluge valve has been moved to a single cabinet. TRIMPAC® Model B-3 & B-3B provides access doors for the emergency release (B.1) and alarm test valve (B.7) for manual operation of these trim valves. TRIMPAC® Model B-3 & B-3B is equipped with priming water pressure and water supply gauge view-ports for easy monitoring of water pressures.