Quick Answer: The Water (Liquid) Level Apparatus is a set of communicating vessels: four vertical borosilicate 3.3 glass vessels of different shapes joined by one horizontal tube, showing that liquid settles at the same level in each.
Last updated: October 2026
Key Features
Four vertical vessels: parallel, tapered, spiral and bulbous or constricted
When water is poured into any one vessel it flows through the common tube until the surface stands at the same height in all four, whatever their shape. The apparatus shows that hydrostatic pressure depends on depth only, not on the shape of the container. Educational Instrument can dispatch the Water (Liquid) Level Apparatus to laboratories in Montenegro, Mongolia, Slovenia, Portugal, Nicaragua and Honduras.
Frequently Asked Questions
How many vessels does the Water (Liquid) Level Apparatus have?
Four vertical vessels in different shapes, parallel, tapered, spiral and bulbous or constricted, joined by a horizontal tube.