I added this between my Rusco 250 filter (standard size) and my home cartridge filter. I developed a 3-stage filtration system to extend the life of my cartridge filters. It is EXTREMELY small and fills up in 30 minutes of use. I was expecting a product the same size as my 250. I will throw it away to get the full size. I can't think of a scenario where this filter would be useful since I pre-filtered the water. My use has not been abused. If you can make it over an hour without flushing this device, I suspect your water is clean enough not to need it! Note: I like my standard Rusco device size and will probably be more careful about buying something like this.
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