Review on Clean And Safe Drinking Water With SpiroPure SP-WP500 NSF Certified Refrigerator Water Filter Replacement (3 Pack) by Nathan Guzman

UPDATE: I found a FF21200 filter on ebay, and it fit/twisted perfectly into the Kitchenaid KSRB25FHSS02 side by side refrigerator filter housing. If I cannot find another FF21200 filter in the next few month as a replacement, I am considering changing the filter housing to accommodate an available filter.I purchased this SpiroPure SP-WP500 filter for my Kitchenaid KSRB25FHSS02 side by side refrigerator. The SpiroPure SP-WP500 is to be a replacement for for my no longer available FF21200 from another company, however the SpiroPure SP-WP500 will not twist into my refrigerator filter housing. By the way, the other company sold me the PH21200 filter, which also didn't twist into housing. I am returning the SpiroPure SP-WP500 for refund. This puts me in a situation that I cannot find a filter to fit my refrigerator. If anyone has a filter solution that will fit my refrigerator, post it as a review.