I had a 2018 single pass Hydrologic Stealth 300 which I used for maple syrup and ran juice , until the sugar content was reached 5-6%. It can take 12-16 hours for 60 gallons of juice. In 2019, twice as many trees were harvested and faster processing times were required, so the decision was made to add more reverse osmosis membranes in series to improve per-pass performance. I received 6 membranes and housings (I only received 2 housings from this seller as they had a limit, the rest I received from another seller, as well as membranes) and after connecting them to my reverse osmosis system, leaks began to appear on. I have tracked the leaks in these cases, 4 leaks in total, and made two attempts to find and fix them. Now after several modifications they work, but out of 8 cases only these 2 leak. I liked the key and the fact that they have a check valve.
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