Homemade Super Soaker Water Blaster

Step 2 Constant pressure System

Having made your pump from my other instructable (www.instructables.com/id/Homemade-WaterAir-hand-pump/ ) you’re not ready to start building the other parts of the super soaker.

Newer super soakers have something call a Constant Pressure System (CPS) now all this actually is, is a rubber bladder in a casing in the shape of a balloon so here’s what you do.

Get a water bottle; I had one with a sports cap, so I drilled through the middle so the water would flow easier.

now take 2 balloons, blow in to one a little just to open it up a bit, then roll the other one up length ways a push it inside the other balloon, you may need a pencil for this. Why are we doing this? well one balloon doesn’t squeeze enough water to give a decent flow but 2 does, when they are together try blowing them up, its much harder which is good as it will give us a good squeeze when we want to release the water.

Now slip the ends of the balloons over the sports cap and hot glue them in place, make sure you make this water tight.

cut a small length of 5mm clear hose and push this through the cap where we drilled the hole  so it goes just inside the balloons and sticks out the cap and hot glue that so its water tight.

drill a few small holes in the bottom of the bottle, this will allow the air to come out of the bottle when the balloons inflate but it wont allow the balloons to squeeze out the holes.

Push the balloons in side the bottle and push the cap up to the neck and hot glue this so it is nice solid you don’t want this to blow out with pressure.

You now have your pressure chamber. You will be able to pump up to 250ml (or just under) in to this chamber at high pressure because the walls of the bottle will hold a lot of the pressure so the balloons will not burst.