High Quality Water Gun

Yesterday I finished two simple water guns I made for my kids. The result was so good I decided to publish a process description for the community of makers.

I started trying out some ideas available on instructables.com but the results were poor, mainly because of the low quality of the pipe I bought at the local hardware store.

What makes this instructable unique is the construction of the piston, made of silicone. This material seems to be perfect for pistons. It is soft to fill uneven sections of the pipe and at the same time it is firm enough not to let throuh any water.

Step 1 Materials and Tools

The list of materials is quite short, but as usual it can be tricky to get really the same parts I used - unless you are from Germany and have the hardware store TOOM in the area you live in.

This is what you will need:
- 26 mm nylon pipe, 20 mm inner diameter (a PVC pipe is also fine)
- 1/2" brass peg (mine is made of brass - again, a PVC end cap would work as well)
- rubber O-ring 1/2"
- M4 bolt 20 mm long
- 2 washers
- ALU rod, 8 mm diameter
- plastic end cap
- wooden grip

You will not need any special tool apart from an electric power drill or better a press drill (see the picture with the tools)