RO/DI unit pressure

[Marianne]

Yes, your membrane is fine, actually if you run it at 80 PSI you will get better production and less wastewater.

35 PSI is dead minimum to get reverse osmosis to work. Be low that all the water will go to drain, you can not overcome the pressure to permeate the membrane.

Jamie posted a link to another post that covers it quite well.

My experience of using thousands of membranes (low pressure residential) is they are not all the same. Dow Filmtec has consistently preformed. More times than not, better than the specs. Desal by Osmonics membranes has brought me great heartache, with bad batches and apparently not so good quality control.

I do have the advantage of feed back form thousands of users. And believe me when something goes wrong I HEAR ABOUT IT!!! So for me to keep people happy and lessen problems (and problem calls) I use Dow Filmtec.