7 Quick Tips For How To Make A Water Pump At Home

This might seem like quite a complicated task to do, but after this article, you will notice that it is a piece of cake. This article shows you how to make a water pump for a science project or as a fun craft. What makes this process easy is the fact that you can use materials that are readily available in your house.

A point to note is that if you want more pressure coming from your pump, use a powerful motor. On the other hand, if you would like less pressure, you can use a less powerful motor. Without further ado, let us get on with it.

How To Make A Water Pump

Materials to be used

To make this water pump, you will need the following materials:

  • 12 Volt DC Motor
  • An old bottle cap
  • Hard plastic (preferably plastic food containers) or aluminum sheet
  • 12 Volt Battery
  • On/off Switch
  • Plastic pipes or straws

Helpful tools that will come in handy are:

  • Hot glue gun or super glue
  • Plastic cutter
  • Scissors
  • Drill

Step-by-Step Guide Line

Step 1: Preparing the Equipment to Build the Impeller

To begin making the pump, we will need to make a water pump impeller. You will need to put the water pump motor in the hard plastic sheet. Around this, you would need to use the old bottle cap you have. Thereafter, you can cut the plastic container so that you are left with just the flat surface. Another option is using an aluminum sheet. This is all a matter of preference.

Step 2: Building an Impeller

With the flat surface plastic sheet, you will use it to make the components of the pump that goes in and out. Next, you can trace a circle on the plastic sheet slightly smaller than the water pump housing. You can do this using a compass found in a geometric set and a pencil. Use scissors to cut that traced out part. Since the plastic sheet is colorless, you can color it to a shade you like for easy visibility.

After that, drill a hole in the middle of the traced out circle plastic sheet which you will use to insert the water pump motor later.

Step 3: Building the Impeller Fins

To do this, take the remaining part of your plastic sheet and cut out a rectangular strip. For accuracy, you can trace the rectangle with a ruler and marker or pen, then use your scissors to cut it out. Following that, use your scissors again and cut out four smaller strips from the large rectangular strip. This will serve as the impeller fins or blades.

Make sure you are keen on the size of the fins. They should be equal to the radius of the traced out circle. Afterward, use your hot glue gun or super glue to stick them onto your circular base. Make sure you give it time to dry out.

Step 4: Casing the Motor

Once you have made the impeller fins or blades, take your old plastic bottle cap and drill a hole at the center. This is so that your water pump motor can fit through. Take your water pump motor and put some glue on it so that it can easily stick to the bottle cap once you attach it.

Make sure the motor shaft fits through the hole you just drilled. In addition, you can make the hole airtight by applying more glue on it.

Step 5: Connecting the Impeller to the Motor

Now take your pump part, which is the impeller, and attach it to the center of the old bottle cap, which acts as the water pump housing by gluing it. Make sure the hole you drilled goes through the motor shaft.

Connect your motor to your battery. When you do this, you will see the impeller blades spinning around and attached to the shaft of the motor.

Step 6: Shut the Pump Housing

To do this, trace another circle from the plastic sheet slightly larger than the inside of the pump. This is the circular base you used to make the impeller. You will also drill a hole which will be the size of the straw or pipe you intend to use on this circular base. From this hole, you will attach a pipe that will serve as the water intake.

Subsequently, drill another hole on the bottle cap. This will serve as where the water will flow out from. From the hole you made on the circular base, pass the pipe or straw through and glue it in order to secure it well. Additionally, pass the straw through the hole made in the bottle cap and glue it as well. The reason for gluing is to ensure the water pump remains watertight.

To finish off on making the water pump, glue the bottle cap all round so that you can attach the circular base on it. Remember to give the components time to be dry out so that they do not dismantle when the pump is switched on.

Step 7: Testing the Water Pump

After this step, you can now test your pump and see how well it is working. The first thing to do during testing is to suck some water into the water pump. No pump will work if it has no water in it.

You can elongate the exit hole and cut out a bigger portion of the straw or pipe so that the water pump can work better. In addition, you can use a bigger motor, which will make the motor more powerful thus increasing the water pressure.


With those few steps, you have learned how to make a water pump. It is not that complicated as you can see. Just get a few materials in the house, follow these simple steps and you have your water pump ready to use. Keep in mind that if you would like more pressure, use a bigger motor to achieve that result.

Image Source: Instructables.com

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