Purchased in July 2017. I am writing a review in October 2017. I have just bought a house on a well that has been inactive for 1-2 years. Brand new filter completely clogged in less than a month. I decided to change the filters once a week until the sediment clears up. These filters at Revain were the only ones I could buy in bulk that didn't break the bank either. The filters are NOT THE SAME SIZE, they are all larger than the more expensive filters but by millimeters and most of them would still fit my filter housing even if it was a bit tight. But now that I've used about half of the bag I bought they are EVEN HIGHER and I had to (as another reviewer noted) cut the filters with a knife to be able to close the filter housing without them. flows everywhere as soon as the water is turned on. If you change filters frequently, I would buy them again because no other filters are as cheap and good. They filter sediment. So I can't really complain. But there is definitely a HUGE difference between these filters and almost every other "famous brand", even beyond the differences in size. If you can afford it, look elsewhere.
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