How to Build a Small Gravity Water Fountain

Written by clayton kim
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How to Build a Small Gravity Water Fountain
Amaze your friends with a fountain that runs by itself. (Photos.com/Photos.com/Getty Images)

Mesmerise your friends with a gravity water fountain that works without batteries. Not only does it save money, it impresses even the smartest of guests. Gravity fountains are sometimes referred to as magic fountains because most people do not know the physics involved in the process. With a couple of 2-liter plastic bottles, tubes and water, you can make a small gravity water fountain. Most of the items you'll need are available at your local hardware store.

Skill level:
Moderately Easy

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Things you need

  • 3 2-litre plastic bottles
  • Power drill
  • Utility knife
  • Power drill
  • 1/8-inch drill bit
  • Styrofoam piece
  • Super glue
  • 1/8-inch plastic tubes

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Instructions

  1. 1

    Fill two 2-liters bottles with 3 cups of water. Screw the cap onto one of the water-filled 2-liter bottles, which is Bottle A. Drill two 1/8-inch holes into the cap. Screw the cap onto the other 2-liter bottle with water, which is Bottle B. Drill two 1/8-inch holes into the cap. Use a power drill and 1/8-inch drill bit to make the holes.

  2. 2

    Cut the remaining 2-liter bottle in half using a utility knife. Discard the top half of the bottle. Keep the bottom half of the bottle, which is Bottle C. Drill two 1/8-inch holes into the bottom of Bottle C. Drill the holes near the centre of the base.

  3. 3

    Cut out a 4-inch styrofoam cube using a utility knife. Apply super glue on the top surface of the cube. Place the bottom of Bottle B on top of the cube. Apply super glue on the right side of the cube. Place the left side of Bottle A on the right side of the cube. The bottom of Bottle A should be level with the bottom of the styrofoam cube. Bottle A and Bottle B will stand side-by-side. Bottle B is elevated 4 inches higher than Bottle A.

  4. 4

    Cut a section of 1/8-inch plastic tube to the length of 2 feet. Insert one end of the tube into the left hole of Bottle B's cap. Insert the other end of the tube into the left hole at the bottom of Bottle C. The tube should touch the bottom of Bottle B and should protrude 2 inches above the bottom of Bottle C.

  5. 5

    Cut a section of 1/8-inch plastic tube to the length of 2 feet. Insert one end of the tube into the right hole of Bottle A's cap. Insert the other end of the tube into the right hole at the bottom of Cup C. The tube should touch the bottom of Bottle A and should protrude a 1/2 inch above the bottom of Bottle C.

  6. 6

    Cut a section of 1/8-inch plastic tube to the length of 1 foot. Insert one end of the tube into the right hole of Bottle B's cap. Insert the other end of the tube into the left hole of Bottle A's cap. Insert the tube 1 inch into the caps of Bottle A and Bottle B.

  7. 7

    Pour water into Bottle C. The water flows down into Bottle A. The water from Bottle A pushes air and water into Bottle B. The air and water from Bottle B pushes air and water up the tube to Bottle C. Water spurts from the tube from Bottle C and makes a fountain. The water drains from Bottle C into Bottle A and repeats a continuous cycle.

Tips and warnings

  • If the holes or tubes are leaking, apply silicone caulk around the edges of the holes and tubes.
  • Wear protective gloves, goggles and mask when handling a power drill.

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