Quick Answer: The Communicating Vessels with Capillaries apparatus shows liquid settling to the same level in connected vessels while rising to different heights in capillary tubes of different diameters.
Last updated: October 2026
Key Features
Connected vessels filled from a reservoir
Capillary tubes of different diameters
Shows equal levels in the wider vessels and capillary rise in the narrow tubes
Coloured water can be used for clearer viewing
Technical Specifications
Specification
Value
Main parts
Connected vessels, capillary tubes of different diameters, base support, filling reservoir
Water poured slowly into the reservoir flows through the connected vessels and settles at one horizontal level, showing equal pressure at equal depth. In the capillary tubes the liquid stands at a different height, and comparing tubes of different bore links the rise to surface tension, adhesion and cohesion, as in water movement in plants. Schools, colleges and institutes in Tunisia, Bolivia, Jamaica, Belize, Egypt and Namibia can order the Communicating vessels with capillaries from Educational Instrument.
Frequently Asked Questions
Why is the level different in the capillary tubes?
In narrow tubes surface tension and adhesion make the liquid rise or fall, and the change depends on tube diameter and the liquid used.
