LG LT600P Premium Refregirator Water Filter See supporting information below for compatible LG refrigerators Replace filter every 6 months or 200 gallons to maximize contaminant reduction Not changing the filter could reduce the water pressure and make it ineffective. So keep an eye for lower water flow. Uses revolutionized technology for water filtration and most of the impurities in water are filtered away Not changing the filter could reduce the water pressure and make it ineffective. So keep an eye for lower water flow.