Copywright© 2000-2002
David Lucitt
GNG fans, this is your site
Power Mods(Hyper Mod System)
Check valve? Now what is that???? Simply put, a check valve allows something to pass through one way, but then closes so it can't pass back through the other way. A one-way valve. A water gun is a system of check valves. Usually two are required. One is to bring water into the pump chamber, and when you push the pump back, it closes and another one opens and brings the water into the pressure chamber. The process happens each time you pump, slowing building up the amount of water and pressure in the guns system. See more about this in the How a water gun works article. But these are not the check valves I am talking about. In super soaker guns, and probably in most other type of water guns, there is once certain check valve that actually controls the pressure and POWER of the weapon. To give you a good description of what I am talking about, I will compare some weapons to demonstrate how this check valve works. A check valve is put in the guns internals so that if the weapon is over-pumped, the check valve opens and diverts the overpumped water back into the tank. It is kind of like a safety for all those who don't know how to pump their weapons, and for little kids who don't know how a watergun works. The pressure of the pressure chamber when fully pumped is more power than it takes for the check valve to open, so the weakest one out of the two gives way-the check valve opens, and the water moves back into the tank instead of into the pressure chamber.
High Pressure Limit(HPL): When I compared the CPS-1000 to the CPS-1200 (low power version) the CPS-1000 acted like the high power CPS-1200 version, but when I shot the CPS-1000 after using the CPS-12,000, it was like using an MX after firing the CPS-2500. The problem with the CPS-1000 is it's weak high pressure limit(HPL) meaning it doesn't take too much force to get the check valve to open after the gun has been pumped full. This is why most CPS-1000s and 2500's squeal if you pump them too fast...from pumping them too fast, the water would rather go back through the check valve and back into the tank instead of meeting that force in the pressure chamber. You can test your gun's HPL by over pumping it once. If the pump feels similar to regular pumping, that means that it has a low HPL...a gun that would not be too good to power mod, cause then when more pressure is needed to expand the rubber chamber, and the HPL was so close to regular pumping, such that regular pumping and the HPL would be equal when pumping fast, the water would automatically revert back to the tank. If you pump your gun, and the pump automatically just stops in it's tracks, like the CPS-1200, it has a high HPL, a good candidate for a power mod. On a low HPL weapon, there is no 'area' between the regular pressure of pumping and the pressure limit required to move the check valve...they are so close. So don't expect the CPS-1000 to get any more powerful unless modding the check valve(which can be an extremely delicate process) Same thing with the CPS-2500. The CPS-2000s HPL is amazing...you can pump that thing up as fast as you want, no sqealing, no nothin', it just takes it. It needed a strong check valve with holding all that pressure in. -back-