The Water Manometer Gauge reads static pressure, vacuum, and differential pressure in systems where accurate low pressure measurement is required. The gauge works by displaying pressure changes through visible movement of a liquid column. This allows users to clearly observe pressure differences without complex interpretation. The visual indication helps confirm system conditions during testing and inspection tasks. Accurate readings support the correct setup and adjustment of connected systems.Attributes:• Enables accurate observation of vacuum conditions in connected lines.• Includes 0.75-ounce bottle of fluorescent green concentrate.• Provided with scale (50 - 0- 50 cm).Applications: The Water Manometer Gauge is located at engine pressure measurement points, where it reads static pressure, vacuum, and differential pressure to evaluate system balance and operating conditions.