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Consumable replacement cycle：
1.5 micron PP filter and 1micron pleated filter : about 3 months
2.Carbon filter: about 6 months
3.UV lamp: about 9000hours, one year.
4.USA DOW RO membrane: about 3 years
Note：the premise of calculation of above replacement cycle is on the basis of satisfying the use and maintenance condition of this equipment, running 20 hours per day