Well, I haven't changed the filter on my 5 series since I bought it. I just forgot about it and it's in an electrical cabinet (stupid I know) and to get to it you have to crawl like a snake into the storage compartment and shut off the batteries and AC power in case you spill water. Anyway, I finally decided it was time. I ordered these filters and made my decision. Unfortunately they didn't affect the taste of the water but my pressure is better. They fit perfectly, although they look a bit different, and they are much smaller than branded filters. Always keep an eye on the O-ring on the top of the housing and lubricate it with petroleum jelly when installing, otherwise it may leak.
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