How Do You Build A Simple Water Pump?
Water pumps have been made, in one form or another, for centuries. Hand-held models are easy to make, and are a fun craft and educational project for you and your kids, teaching both problem solving and some of the principles of hydraulics. Step 1 Cut a piece of 2 1/2-inch-thick PVC pipe to about 12 inches long. Cut a small circle about the width of the PVC opening out of a flat, flexible piece of rubber. This will serve as a flapper, just like the one at the bottom of a toilet tank. Leave a slight tab about 1/2 inch long on the edge of the rubber. Step 2 Use a waterproof marine glue to glue the tab of the circular piece of rubber to the inside edge of the PVC pipe, just near the end. Score the point where the tab connects to the rest of the flapper. Step 3 Remove the cap from the top of an empty plastic 2-liter soda bottle. Now cut the top off the bottle. Use the marine glue to glue the bottle top to the outside edge of the PVC at the same end the flapper is attached to. Step 4 Attach
