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Last year when my old Amana fridge compressor broke, I had purchased a new fridge that dispenses purified water and ice. The fridge had its own MWF filter that you screw into the bottom of it and it is easily replaceable. Though my filter expired (shows that it needs replacing) last month I haven’t had a chance to purchase a replacement filter yet I still drink water and use ice. I need to replace it soon so the filter doesn’t start corroding and potentially contaminating the ice and drinking water. I am not sure how long you could go on the same filter before it can actually cause some particles to float in your water.
I still think filters and purifiers are a little too expensive for everyone’s budget, the ones for the sink faucets are cheaper than the ones for a refrigerator but they are still cheaper than if you buy gallons of fresh or purified water every day or week, and you aren’t polluting the environment with all the plastic bottles you are wasting by purchasing bottled water.