After making a simple water gun that required no valves and had limited function, I wanted to make a continuous-pump water gun that would work more like a Super-Soaker. I tried various materials for valves and various methods of placing the valves in the gun, and finally came up with this solution.
You can look at a larger version of the composition of this hand-pump water gun by clicking on the sketch below. Print and take it with you when shopping for materials. Below is a video showing how to put together the valve system and the piston for the pumping action. You can buy check valves at a hardware store, but they are too bulky for a kid’s water gun. Besides, I wanted to make this project something that could be taught in a grade school science class for children to make and understand the mechanics of water pumps.
Materials for Water Pump Gun:
1″ and 3/4″ PVC
1″ PVC Tee
1″ to 3/4″ bushing
1″ to 1/2″ threaded reducer
1/2″ to 1/4″ nylon barb
1″ rubber washer
3/4″ metal washer
Inner tube rubber
Piece of thick, firm foam (like from a flip-flop)
End cap for piston arm (either 3/4″ or 1/2″)
DIY water guns are a great idea for summer fun! And you helped me figure out a long time “manual pump” problem I had been mulling over.
Could you please send to me the information and all details of your project.
it is good for me to apply
Just click on the drawing to make it bigger, then print the drawing. All the details for the water gun are there. Thanks for stopping by!