I give 5 stars because of easy installation. I put it in our fountain house. I've had problems with this fountain house for years. I paid $1400 for a cracked fiberglass tank. I really didn't want to pay that much again for a new filter system. It was an alternative. It was easy to install, didn't lose any pressure. The water still tastes like well water, but it is clear. I would recommend it to friends.
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