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Can be used on the Spas that used the 6540-507 Microclean II filter on 2005-2008 850/880 Systems. The 6473-164 (Inner Microclean filter) must be used with a 6473-165 Filter (Outer Filter).
The MicroClean water purification system featured on 880 and 780 Series spas surpasses all others for ensuring pure, clear water with low maintenance and reduced chemical usage. The system does this by combining efficient, effective filtering, water circulation, and water skimming processes.
Both the MicroClean Plus filter in 880 Series spas and the MicroClean filter in 780 Series spas employ technology similar to that used in home drinking water filters.