After a few tries and enough sealing tape (teflon) this thing is still leaking at the threaded inlet. I had to cut the water lines to fix it and as it is narrow there is no room to move and no room for error. So another time I'll rip it apart and use heavier gauge plumbing/putty to try to seal the threads. If that doesn't work I'll cut my losses, buy another brand and throw it in the trash. This filter replaces a slightly smaller block that you cannot find O-rings for. Perfect.UPDATE: rating change. Used a stronger sealing tape for the plastic threads and the leak is gone. Recommend anyone installing to use PVC tape.
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