Product review (4 stars): Increase Your Water Flow and Wallet Size
These seem to be okay although they are way too expensive. I will eventually order another but I came upon a solution to extend your filter life if it is just running slowly. I removed this one to replace it with another but I stupidly ordered the wrong size. So, figuring the filtration is done with charcoal, I decided to rap it a few times on the side to dislodge any blockage. I reinstalled it and, voila! - It ran full force again and since it has water inside, there was no need to remove air bubbles again. So like I said, I will still eventually bite the bullet and order another of these but it won't be so soon due to low water flow.