Check the price of a new filter and check the price of a replacement filter for this pump. Most of the price of a water filter system is the filter cartridge, and you probably should replace the cartridge soon, if not right away. The price you pay for this filter should be less than the difference between the cost of a new filter system and the cost of a replacement cartridge. Otherwise you would be better off buying a new filter system.
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey