Today my dad and I hooked up my RO unit. We couldnt figure out a way to turn it off other than by turning the unit which intersects with the water line (sorry i dont know what this is called, seen in pic# 3) and my dad didnt think it would be good to keep opening and closing that, so we added a valve to turn off and on (pic# 4). We had it on for several hours today as instructed, then when i turned it off every 30 seconds or so it made a very loud grinding noise for a secod or two. After watching it for a bit it appears the object in pic# 1 is vibrating, and causing the noise. Any ideas?
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