Model of a Water Gauge

Model of a water level glass for steam boilers. The glass tube is housed in a copper tube. At both ends, a tap with a flange is attached at right angles; the lower one was connected to the water and the upper one to the steam. At the bottom there is a third tap for cleaning and other purposes; the upper end is closed with a nut. All gaskets are made of lead. With this level glass, the boiler water level was checked.