Best 4040 ro membrane

What's the best membrane to buy for low tds and production rate with booster pump?

Purchased a new spectrum 4040 about 3 months ago, I'm really unhappy with it. Mains tds is 330 and after ro with booster it's 20.

Would expect it to be below 10.

Cleaning warehouse tell me that's normal for a spectrum RO [emoji848]

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try vyair. been using their membranes for a while same in tds as you and comes out 7-10ppm

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Chris Finley said:

try vyair. been using their membranes for a while same in tds as you and comes out 7-10ppm

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Click to expand...

Purchased the vyair membrane and had it running all day Saturday, still only getting a reading of 15tds. How long did it take for your membrane to settle down and start producing lower tds levels?


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