Loading... Please wait...CP2002DBW Wall Mount - Double Bag for Water Based Machine Coolants. Two bags greatly increase the time between filter changes over a bag and cartridge combination. You still remove well over 96% of all particulate matter down to 1 micron. The bags can be emptied and reused. A wall mount unit that is plumbed into the machine coolant line. Typically extends machine coolant life to one year.