The original was installed under the sink by a plumber and I haven't bothered to change the filter for almost 18 months. water began to flow. Fear of removing the filter, opening the cartridge, and possible leaks were the reasons I postponed the replacement. All I had to do was turn the block to the left, change the cartridge and put it back in. Ten minutes passed and the water rushed back. The taste is always good. To make sure the taste is better, you have to go to a friend who doesn't have a filter and try it. I subscribed and saved every six months to save some money
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