With all the construction going on and broken water mains near my neighborhood, this filter is getting a good work out. I have to thoroughly clean my device every time I change my filter. I too had some of the same problems of leaking from the fitting but not after a good cleaning. Glad I bought this. Some of you who are having problems with this type of filter may have the same particulate contamination as I have and should look in to just using a pitcher type filter. As a side note, be sure to reset the pressure sensor (located inside the filter) for the green, yellow and red L.E.D. lights. I usually use a straightened paper clip to pop it back up.