Patent ID: 7828048

Claim:
A tank for use in a system that outputs a liquid at a user defined constant temperature, the liquid being used to control the temperature of a piece of equipment, said tank comprising: (a) a rigid body of material having a top wall, a bottom wall and a plurality of other walls which collectively define a chamber for receiving and storing a supply of the liquid, the top wall having a fill port for introducing fluid into the chamber, one of the other walls having a return fluid port that is internally threaded, and one of the other walls additionally having an outlet port through which fluid stored in the chamber is discharged from the chamber, the fill port including an outlet end and a vent to allow the area around the top of the fill port to be at atmospheric pressure, (b) a filter disposed below the outlet end of the fill port, (c) a return fluid flow velocity reducer for lowering the velocity of fluid exiting the return fluid port, and (d) a sight gauge for providing a visual indication of the level of the fluid in the chamber, the sight gauge being partially disposed in the chamber and being partially imbedded in the body of material, (e) wherein the level of the fluid in the chamber will be about the same as the level of the fluid in the sight gauge.