Gauge Stainless Case Air 0-80 Retard 250psi 3-1/2″ UL/FM (60) Min.(1)

product code:   GAASS250 Fire Sprinkler Air Gauge with
Retard, 3-1/2″ Stainless Steel case, Glass face, 0-250psi. retard at
80psi. Air Gauges are designed for use on dry sprinkler systems. Bronze
Bourdon tube movement. Gauges are UL listed and FM approved