Anyone who buys this filter. The threaded holes are too big. 2 bought and installed. All 4 holes are leaking. For the second install I removed and used teflon tape and pipe grease. I made 8 turns of tape and applied sealant over the tape. This prevented further leakage. These are good units, but a design flaw needs to be fixed or they will get a bad reputation. I'm a licensed master plumber so I knew what to do. If a plumber with an hourly license performed the installation, the property owner would easily lose hundreds of dollars in time and materials. Another thing, the entry and exit markings are very difficult to see. Above, this red hole always points to the water entry side.
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