Red Line Level Tubes

Red line gauge glass tubes are a premium alternative to plain gauge glass, featuring a distinctive red line running the length of the tube that significantly enhances the visibility of the water level in boiler and pressure vessel gauge assemblies. The red line creates a strong colour contrast against the water column, making level readings easier and more accurate — particularly in poor lighting conditions or where gauges are viewed from a distance.

Available in a comprehensive range of lengths and outside diameters to suit the majority of standard water level gauge fittings, each tube is manufactured from high-quality borosilicate glass to withstand the demands of high-temperature and high-pressure steam applications. Sizes are available in both imperial and metric dimensions, with outside diameters of 1/2", 3/4" and 3/8" across lengths from 7" up to 2 metres.

Key Features

• Red line stripe for enhanced water level visibility
• High-quality borosilicate glass construction for heat and pressure resistance
• Improved readability in low light or at distance
• Wide range of lengths and outside diameters available
• Imperial sizes from 7" to 30" and metric lengths up to 2 metres
• Outside diameters available in 3/8", 1/2" and 3/4"
• Suitable for steam boilers, pressure vessels and water level gauges
• Ready to fit replacement tubes