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-   -   RO/DI Maximum Input PSI? (https://archive.reefcentral.com/forums/showthread.php?t=1286439)

xraydoc 01/05/2008 10:10 AM

RO/DI Maximum Input PSI?
 
Have a question. I have a new filter guys ocean reef +2 unit that is installed and working seemingly normally. However, it seems to be making about 35 gallsns every 6-7 hours and that seems like too much given the 75 gpd rating.

My input PSI is between 80 and 90 and the water temp is probably 50-60 degrees F. Input TDS ranges from 2-13 and output TDS has always been 0.

Is my output OK, could my input water pressure be too high?

Also, how long should DI resin last, I assume that is dependent on how bad your local water is. Ive made about 150 gallons of water and have notices some color change at the bottom of the first DI stage.

Any help would be appreciated.

BuckeyeFS 01/05/2008 03:02 PM

If you check out the calculator on our website, you'll see that you should expect abut 88 gpd under your conditions. Your pressure is not too high - the more the better up to about 90 psi.

Looks like you are getting about 120 gpd.

I suspect your membrane is not fully seated. What is the tds of your tap water, your RO, and your DI? What is your waste water to purified water ratio?

Russ @ BFS


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