Product review (5 stars): Not discontinued
I researched these filers over a year ago when I was hunting for the cheapest place to purchase a replacement. The "A" model is not discontinued, it just doesn't filter out as much as the "B" model does. So if you are looking for a filter that meets ANSI 42 standards this will do just fine. If you want a better filter that meets ANSI 42 and 53, then go with the more expensive B model. It really depends on the water you are filtering as everyones water from the tap will be different. I have purchased both filters from discountfilterstore.com with excellent service and their website provides the breakdown of particulates filtered for each model. Don't take everyone lines of something being discontinued. They wouldn't still be selling them years later if they were discontinued.