Safeguard gauge replaces tubular glass that is mounted between tubular gauge glass valves. The packing nut on the tubular valve tightens around the metal nozzles of the Safeguard gauge, not glass. Nozzles match the O.D. of 5/8″ glass or 3/4″ glass.

Remove the broken gauge glass from the stuffing box of the valve. Insert the 5/8″ or 3/4″ metal nozzles into the existing valves. The stuffing box seals around the metal nozzle, not the glass

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