I purchased the RCC7AK RO system back in Feb 2019. It has been working quite well with the usual filter replacements and a couple of RO membrane replacements. TDS wise, I have always been happy. Last I checked the tap water TDS was ~340 while the purified water TDS was ~30. It is quite good considering the alkaline filter would add back a few salts into the water.
Now to the problem: a few weeks back I noticed a tiny leak from the top of the purple (transparent) filter housing. After a bit of investigation, it seemed that the top white portion of the housing had a hair line crack. Since my system is an old one (from 2019) and most of the iSpring systems were redesigned in 2020, I was out of luck getting a replacement part easily. This is where Jonathan from iSpring support came into picture. I called the iSpring support looking to get help in identifying the suitable part. Jonathan, quickly pointed out that a single suitable part would be problematic. Instead, he recommended to send me the entire filter housing assembly which would eliminate the hassle and enable me to quickly swap out the broken piece with a new one. He was quick to process the shipping of the new part and help resolve the issue at its root. Great customer service, Jonathan!! Keep it up.