Hydronix BW-4040 Hydron High Performance Commercial and Industrial Membrane, 2400 GPD, 40" x 4"

I bought this in March 2023 and it has met expectations. There was a noticeable improvement as soon as I replaced the old one with this new one. Since this purchase I have ordered an additional one to swap out with the second part of my House RO system

Just what I needed.

Membrane was delivered quickly and in good shape. FIrst time changing on my own. Was easy to pull old and insert new. Tested water quality in PPM. Before with old membrane was 65ppm asfterwards showed 45 ppm. Perfectly in range as it should be. Price was great compared to $800 water companie wanted to come change my RO membrane. WIll definitely be ordering an extra to have on hand.

So far product works really good. It fit out RO system.

Finally installed this membrane after buying it 6 months ago. My RO system operates only on city water pressure (no booster pump). Feeding softened city water with ~550 ppm of TDS, and using a very low ~1.5x reject vs permeate flow to minimize water waste. This membrane is generating >900 ppm TDS in the reject stream and 5-8 ppm TDS in the permeate. Astounding performance !!!