How to make a water pump

Master class on how to make a powerful, low-voltage water pump for various needs. For example, pump out a barrel of water for watering plants, etc. The pump works perfectly from a 12 V battery, which is its primary advantage.

Will need

• Electric motor 775 - the first thing you need. It can be purchased at Ali Express link. Or find a similar one.
  
  
  
  
• Fitting for PVC pipes. The pump housing will be made from it.
  

Making a water pump

We take an adapter with a diameter of 50 mm to 32 mm.

And a plug for a 50 mm pipe.

In the plug we place holes for the engine: two for mounting screws, one for the shaft.

We drill out and remove burrs.

Now you need to cut off the bottom part. We mark a straight line by rotating the plug.

We cut it off with a hacksaw. Using sandpaper, we level the surface and get rid of burrs.

We also cut off the skirt of the adapter using the same pattern.

We combine the adapter with the plug to check the evenness of the surfaces.

We take a small piece of PVC pipe 20 mm in diameter and cut it at an angle of approximately 45 degrees. Next you need to create a rounded surface of the cut edge.To do this, wrap the adapter with sandpaper and grind the edge of the tube until it forms a circle.

We make a hole in the adapter for the tube.

Glue the tube into the hole using epoxy glue.

Let's take a disposable syringe and check how tightly it fits onto the motor shaft. If it’s tight, then that’s normal, that’s what we need.

Cut off the tip of the syringe.

To make the impeller, you need to cut a square out of aluminum. Make a hole in it so that the skirt of the syringe fits tightly.

We mark the square into 9 parts.

We draw diagonals in squares across the cell. See photo.

We cut off the corners with metal scissors.

We bend the squares. See photo:

From an unnecessary inner tube from a bicycle or car, we cut out a gasket for the engine.

We take the motor with propellers.

We put on the gasket, put on the plug and fix it all with screws.

Then we put the cut-off pipette from the syringe on the skirt towards the motor.

Next we put on the impeller. Everything should fit very tightly. It would be a good idea to glue everything with epoxy-based glue.

From a pipe of 50 mm diameter we cut out a ring, approximately 10 mm wide. We insert half into the adapter. We remove the part that is visible through the hole.

Putting the pump together.

Seal the joint with hot glue.

We put an angle fitting on top of the tube.

And into the adapter we glue another adapter from a diameter of 32 mm to 20 mm. Fix with hot glue.

We insert the tube. This will be the water intake.

It's time for testing. For reliability, you can fix the motor on the board, tying it with a metal clamp.
We will connect the system to a voltage of 12 V. We lower the intake pipe into a container of water. We apply voltage and the pump works.

The jet is thrown about a meter.

Where and how to use such a design is up to you. Bye everyone, see you soon!

Watch the video