RO/DI unit pressure

[Jack]

I think we all need spell check ;)

Thanks guys, good to know I didn't hurt my brand new RO membrane, boy would that of made me mad.

Steve, thanks for the info. And to your question about does it make good water? Uhh, yeah. Sure I don't know. I have no major problems yet, I just have a bit of algae cause the tank is new, you can barely notice it though. Snails and hermits are comming tommorow :D

[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.

[Acro]

Marianne,

Your knowledge is a great asset to this board thank you.

Jamie

[Davesreefpure]

You need 37 psi to permeate the membrane you will have an increase in waste and gpd the desal membranes are rated at 90 psi and the filmtec are rated at 80 I woud not stay at 80 but close is nice also the 125 psi people are talking about is the canasters and membrane housing you hit the membrane at 125 you will tear the thin film.

P. s. MARIANNE IS THE WATER God BUT HAD TO ATLEAST PUT IN MY 2 CENTS
Hope I do not up[set here cause she can make me look foolish in her sleep lol