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With a structure constructed from tough plastics, this Monument drain test U-gauge is used both for testing pipework installations with air for leaks before the introduction of gases, and also for checking and setting correct gas pressures on domestic and commercial appliances. It is marked in millibars and the scale adjusts, to zero the water level. The extruded cover slides off easily and can be clipped over the base to stand the tool vertically while in use. The hanging tab permits vertical hanging from a suitable protrusion.Features & Benefits: Monument 258F Drain Test U-Gauge - 24 inch, Capacity 60mb, Tough plastic material, Black in colour, Used for testing pipework installations, Extruded cover slides off easily and can be clipped over the base to stand the tool vertically. Monument 258F Drain Test U-Gauge - 24 inch