The ProWater 850i Continued
The pump and reservoir are attached from the factory. On the reservoir, you will find a fill port at the top and a return port for the water coming back to the start of the system. Notice the low and high marks. It is important to always keep fluid above the low level. If not, the returning cooling will splash into the other liquid and allow air to pass through the system.
The pump is a small impeller type that pulls coolant from the reservoir and pushes it up through the cooling loop. The pump uses the same connectors as the fan; a 4-pin Molex for power and a 3-pin fan for tachometer use only.
Many water cooling systems are silent to the point where it is difficult to know if the system is actually pushing fluid through the loop. Thermaltake makes it easy to give you peace of mind with their device that allows you to see that coolant is flowing through the system.
The PW 850i comes with enough tubing and coolant to use the system in the largest cases. Both items react to UV black lights and glow a neon green color. It is important to remember to use only the amount of tubing needed for your application. More tube means the pump has to work harder to pass the fluid through the system, reducing flow.