Homemade Super Soaker Water Blaster

Step 3 The Water Tank

Take your 2lt coke bottle and take the cap off, drill 2 holes in the cap so your copper pipe will fit through.

cut a short piece of copper pipe and push it half way trough one of the holes in the cap

now you need to bend your copper pipe (I had a pipe bender) so you have a 90 degree angle, then cut your pipe about 5cm higher than the top of the bottle when its laying down this will be your air intake so it needs to be above the water level. And push this through the other hole.

Hot glue these in place.

Make up a one way valve like you did for the pump before, I stuck the water cap to the top of mine to stop dirt getting in it. The valve needs to let air in but not let water out. you have to have an air inlet otherwise your bottle will collapse which will make lots of noise and you may not want to be heard when creeping about ready to jump out on someone and soak them. :-)

then hot glue this to the top of your air inlet pipe making it air tight.

Now cut 2 short lengths of 5mm pipe, one will go inside the bottle from the copper pipe so it needs to be long enough to touch the bottom of the bottle. The other will go to the pump inlet so make it about 10cm long. Best make it too long than too short.

Using a glass of hot water hold the hose in the water until it becomes soft then pushes them on to the copper pipe.

Now screw the cap to the bottle and you have your water tank ready.