About 2 years ago I purchased this under sink spa water filtration system Model #: WHKF-DUF. At that time it worked perfectly, the filter was changed once a year. Last night the PLASTIC rebar holding the water inlet pipe broke in half and flooded the floors in my house. I took a look at what was broken and it turned out that it wasn't a blue hose but a gray fitting that contained a hose on the filter. BREAK IN HALF! As if someone had broken it off like a branch. I called Whirlpool and they said the warranty was expired. I was hoping they had a METAL fitting that could be used but they have NO parts like they said. So be careful, threaded plastic fittings can break for no reason and allow water to RUN! If anyone knows of a flushing water filter with metal fittings, please let us know! I will buy 3 water detectors from Amazon.
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