Review on ISpring WGB21BM 2-Stage Whole House Water Filtration System, 10” X 4.5” Carbon Block And Iron & Manganese Reducing Filters, 1" Ports by Adam Boudreau

I purchased this twin tank system for my RV. Unit came very well packaged and I was very impressed with the initial quality. Thick steel mount, thick walled tanks gave me a sense of quality. I knew in advance this system does not come terminated on the input and output so I put on my own fittings. In my case I wanted garden hose fittings.The output side worked very well, easy install, no leaks. However, no amount of tape or plumbers putty would stop a small persistent leak on the input side. In fairness the leak was very small, about one drop every 30 seconds. I re-installed the fittings four or five times with the same result. A tiny leak. I was about to give up when I noticed the leak was always in the same location. I removed the fitting and took a magnifying glass only to find what looked like a hairline crack in the threads. I took the canister off and looked inside only to find a tiny pinhole in the plastic housing.I took some plastic solvent and repaired the threaded section and the internal housing and the leak stopped. I think what happened is during the molding of the housing the liquid plastic did not completely fill the mold and left this tiny pinhole through the housing to the external threads.Not sure if this would have been caught at the factory or if these units are even tested before leaving the factory, but this is a very small quality issue they should look into.So the only reason I gave it 4 stars was because of this tiny leak. Time will only tell if the repair holds, but so far I am leak free.Overall this is a high quality unit and I would not hesitate to buy another if needed.