I am a professional waterline installer and I install many filters. I ordered one was missing the o-ring (needs to be made with two anyway) and part of the black plastic part of the receiver at the top was also broken and it wasn't a remanufactured unit, it should have been factory new. in my shop for a few weeks before my installation and now it's 10 days late to return it. Do yourself a favor and get a Geek Parts branded block instead, which is better in almost every way, including the receiver's brass threads.
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