While most CPS and CPS-type chambers (i.e. Water Warriors 'Hydro Power' diaphragm chambers) can just be pressurized and are good to go, there is a way to get just a little bit better performance from them.
The problem is that, when empty, CPS chambers usually do not completely collapse. This means that there is usually some air trapped within the firing chamber. As the CPS system relies on elastic pressure, not air pressure, leaving air in the firing chamber offers no advantage and actually just reduces the amount of water available to fire.
Thus, to improve performance, one should prime the CPS-bladder to remove any trapped air.
To prime a CPS-bladder, simply follow the steps outlined below:
1) Fill the blaster's reservoir with water;
2) Hold the blaster level to the ground and pump a few times slowly - slow pumping ensures one doesn't accidentally pump air into the pump. As well, slow pumping helps prime the pump as well, making sure that the pump ends up filled with water and not air;
3) Aim the nozzle upwards (45 to 80 degrees from horizontal), pause a moment, then pull the trigger to shoot - the short pause is useful to ensure any air in the firing chamber moves closer to the nozzle while the heavier water moves towards the back of the firing chamber;
4) Return the blaster to horizontal and pump a few more times;
5) Angle the blaster upwards, pause, and fire again;
6) Repeat as necessary until the blaster produces a nice, solid stream that is free of air bubbles;
7) Pump up the entire firing chamber and do one short test shot to ensure all air has been removed;
Refill the reservoir and go on soaking!
The overall priming process is actually quite quick to perform (a lot quicker than it takes to read this guide :goofy:). However, the improvement in blaster performance, IMO, is worth the additional time spent priming.