Communicating Vessels
Product Code : SCL-CL-11889
Communicating Vessels (SKU SCL-CL-11889) is a set of differently shaped glass tubes joined at the base and mounted on a stand, showing that a liquid settles at the same level in every connected vessel whatever its shape, size or volume. It suits hydrostatics lessons in middle school, secondary school and college. The set is available through Science Lab Supplies, which takes orders in Ambala, India, from schools, colleges, tender contractors and distributors.
Specifications
All specifications of the communicating vessels set are broken out in the table below. In short, several glass tubes of different shapes share a common connection at the base and are mounted on a plastic or phenolic-resin stand, and the liquid surface stays horizontal in every tube even when the apparatus is tilted.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11889 |
| Vessels | Multiple glass tubes |
| Tube shapes | Different shapes, sizes and volumes |
| Connection | Tubes joined at the base |
| Stand | Plastic or phenolic resin |
| Principle shown | Liquid levels stay equal in interconnected vessels |
| When tilted | Liquid surface remains horizontal relative to the earth |
| Topics | Fluid mechanics, hydrostatic pressure, water level gauges |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Communicating Vessels
The apparatus proves that liquid pressure depends only on depth, not on the shape or volume of the container, so connected vessels fill to one level. It suits CBSE/NCERT Class 8 and 9 science and Class 11 physics (mechanical properties of fluids), and helps explain water level gauges and similar real-life systems.
- Class 8 science: showing that liquids find their own level.
- Class 11 physics: linking equal levels to pressure depending only on depth, then showing pressure rising with depth on the Fluid Pressure Apparatus (Spouting Cylinder).
- Explaining boiler water gauges, water towers and garden-hose levels.
- Tilting the stand to show the free surface stays horizontal.
- Pouring in coloured water from a transparent plastic Volume Measuring Cylinder and comparing the levels as each tube fills.
Standard Scope of Supply
The set is supplied as the connected glass tubes mounted on their stand. Water, with a few drops of colour to make the levels easy to see, is prepared in the laboratory, and other hydrostatics apparatus can be added to the same quotation.
Packing, MOQ and Lead Time
Quotations are available for a single demonstration set or for several sets for group work, and each states the packing, delivery time and price for the number requested. Other hydrostatics apparatus from the range can be quoted at the same time.
Registered with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. A fluids bench can be priced in one go: list the vessels and companion apparatus on the contact page or in the enquiry cart, and use the lab tender page where a tender applies.
Frequently Asked Questions
What does the Communicating Vessels apparatus demonstrate?
It shows that liquid in connected vessels settles at one level regardless of each vessel's shape, size or volume, because pressure in a liquid depends only on depth.
Are the tubes glass or plastic?
The tubes are glass, so the liquid levels are easy to see; the stand is plastic or phenolic resin. Handle the glass carefully when filling and cleaning.
Who supplies the Communicating Vessels?
Science Lab Supplies handles this set from Ambala, India. A single set for the teacher's bench or several for group work can be quoted to schools, colleges and contractors, with other fluids apparatus on the same document.
How do I make the levels easier to see?
Add a few drops of food colour or ink to the water before pouring it into the tubes. The coloured surface then stands out clearly against the glass, so the equal levels can be seen from the back of the room.
Related Fluid Pressure Apparatus
Communicating vessels open the topic of liquid pressure, which these items continue through pressure measurement, force transmission, buoyancy and flow. Drawn from the Chemistry Lab, Physics Lab and Properties of Matter ranges, they make a fluids bench for school and junior college physics.
- Communication Vessel Apparatus — four vertical glass pipes of different shapes on a common horizontal pipe, on a 230 x 100 x 22 mm wooden base.
- U-Tube Manometer — glass U-tube with built-in reservoir and an 80–0–80 scale in 2 mm divisions on a 400 x 80 mm panel.
- U-Tube Manometer on Stand Table Model — manometer on a wooden base with a 50 cm scale for pressure and differential pressure.
- Demonstration Hydraulic Press — two connected fluid-filled cylinders in which a push on the smaller piston moves the larger one.
- Archimedes Bucket — transparent bucket and metal cylinder for buoyancy and displacement work.
- Bernoulli Tube Apparatus — two 500 x 13 mm flow tubes with side tubes for manometer readings along the bore.
- Simple Pascal Law Experiment (Pressure String) — hollow ball with holes round one circumference and a piston tube.
Browse the full Chemistry Lab range, the Properties of Matter range, or all school lab equipment.
Last updated: 9 October 2026
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