Very well built for heavy use, just what you would expect from something you wouldn't want to replace after a few years. If there's one thing you don't like about this filtration system, it's that the filter housings are opaque and you can actually see the sediment build up. I had no problems installing the new system, I used teflon tape and pipe grease to ensure a perfect seal with no leaks. Now for a noticeable problem. The water pressure was noticeably lower, so as a precaution I took out both filters and restored the pressure. Then I put the filters back in one by one and that's when I realized the problem was the charcoal filter. I contacted iSpring and spoke to an account manager named Nick. He was very professional, listened to my complaint and immediately sent me to another specialist. I am happy to report that this has resolved the printing issue and I am very satisfied. Thanks iSpring
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