Pair Vintage Hodgman Fire Sprinkler Air Pressure Gauges Marsh 250 PSI Brass

  

Quantity Included: Two (2) Matching Pressure Gauges (Variant Pair). Instrument Manufacturers: Marsh Instrument Company & Jas. System Application: Fire Protection / Dry Valve Sprinkler Air Line Set. Pressure Range: 0 to 250 PSI (Pounds Per Square Inch) each. Safety Compliance Marks: UL 74 Stamp (Left), UL 57A Stamp (Right) & FM Shields.

Case Construction: Heavy Industrial Metal Shells with Polished Brass Bezel Rims. Fitting Design: Male Threaded NPT Lower Vertical Stem Mounts.

Face Details: Integrated Physical Needle Stop Pins on both dials. Overall Grade: Pre-owned / Vintage Industrial Surplus (Premium Collector Quality). Mechanical Needles: Both needles rest perfectly flush against their zero stop pins; internal mechanisms remain unbench-tested under live pneumatic load. Glass Crystals: Both front clear face crystals are entirely clean, solid, and free of cracks, deep chips, or clouding.

Housing Patina: Beautifully matched, authentic historic workshop aging with clean, bold, completely legible dial typography on both pieces. Thread Connections: Both lower male mounting stem threads are sharp, distinct, and free of cross-threading.