How to Build Your Own Water Gun

This is an inexpensive and easy way to make your very own water gun from things you can buy at a hardware store. Any child or adult can use one, because, since you make it yourself, you can choose the length of your gun. There's no complicated water tank filling. You can just place the end of the gun in some water and pull the pump! Since there is no complicated spray mechanism, this water gun is less likely to be clogged by dirt or sand, so you can take it to the beach! You can easily take it apart to clean it, so there's no problem with getting it dirty. You'll have a inexpensive, convenient, simple, durable water gun!

Difficulty: Moderate

Instructions

Things You'll Need:

• 1-inch schedule 40 PVC 1/2-inch schedule 40 PVC 1/2-inch CPVC 1/2-inch unthreaded schedule 40 PVC end cap 1/2-inch ID 5/8 inch OD O-rings (3) 1/2-inch wooden or aluminum dowel Epoxy Nuts, Bolts and Washers

How To Build Your Own Water Gun

1. Cut two 1/4-inch pieces from the 1/2-inch CPVC pipe.

2. Cut 15 1/2 inches from the 1/2-inch dowel.

3. Cut 4 1/2 inches of the 1-inch schedule 40 PVC pipe

4. Use a pair of scissors to cut the two pieces of CPVC pieces on one side.

5. Place the pieces of CPVC on the end of the dowel and leave 1/4 inch between them.

6. 
   Dowel set in clamps so that the epoxy can dry.

   Use epoxy to glue the pieces in place and let it dry.

7. Use a drill to make 1/2-inch hole in your 40 PVC end cap.

8. Sand the two pieces of attached (now dry) pieces of PVC until they will fit inside your 1/2-inch PVC pipe.

9. 
   Three o-rings between the two pieces of PVC, forming the seals.

   Put the o-rings between the two pieces of PVC you glued onto the dowel.

10. Drill two holes in the other end of the dowel. One hole should be 1 inch from the end, and the other one should be 1 1/2 inches from the first hole you drilled.

11. Drill two holes in your 1 inch PVC piece. One will be 1 inch from one end, and the other hole will be 1 1/2 inches from the opposite end.

12. Make a handle from your piece of 1 inch PVC by attaching it to the dowel with some washers, nuts and bolts.

13. Put the smaller piece of the gun (the pump rod) into the larger end (the pump shaft).

14. Push the pump rod all the way into the gun's pump shaft, dip it into some water, and pull the pump rod back again to fill your gun.

15. Aim your gun and push the pump rod in, forcing the water out the end cap.

Tips & Warnings

• Label your parts after you buy them, or this project MIGHT get slightly confusing. When you go to buy your supplies, bring a list of the parts shown to be sure that you get the proper ones.
• Epoxy is very strong adhesive, and it is not advised that children be allowed to work with it without careful supervision.