Is there a reason?

DARKSILENTTYPE · 06/21/2007, 07:43 PM

Is there a reason that I shouldn't run two RO units at the same time . One after the other ?

zt444a · 06/21/2007, 08:30 PM

I can't think of a reason you can't, unless it possibly has something to do with the DI water running through your filters again. Why it would damage them I do not know....

Ask Dwayne at MS. He is a water treatment guru. If anyone would know for sure it'd be him. Achillestang2002 I think he is on here....

Nanook · 06/21/2007, 10:23 PM

I run two 90gpd in series...no probs.

Let's see some pics of that Zeovit tank!!

superfirefly · 06/22/2007, 07:05 AM

I would imagine you would want some sort of pump between them to create the pressure needed for it to operate correctly. I don't know that for sure but everything I have read states thta you need a certain amount of pressure for proper filtration.

DARKSILENTTYPE · 06/22/2007, 12:14 PM

Quote:

Originally posted by Nanook
I run two 90gpd in series...no probs.

Let's see some pics of that Zeovit tank!!

Just started the zeovit only method back up .Give a couple months to get everything stable again .

How do you have yours set up with the two Ro systems ?

Nanook · 06/22/2007, 01:37 PM

I have mine in parallel....not in series. It is the standard Spectrapure 90gpd RO membranes.

Mykayel · 06/22/2007, 10:42 PM

my question is why would you want to? With a good set of filters and new DI resin you will get 0 TDS. So if you run it through a second filter what would you be accomplishing as you've already removed everything?? The only thing I can see that you would accomplish as you would be waisting a certain ammount of water as waist water through your second filter.. water that was perfectly good. And by creating more back pressure, you won't get as much flow through your initial filter there by making it less efficient. So the only thing I could see you gaining by doing this is making more waist water and less final product that isn't any better quality than if you were only using one filter.

That's my thought but I could be wrong... anyone have a contradicting thought?

sirreal63 · 06/22/2007, 10:47 PM

John I would imagine you can run the effluent line from the first into the membrane input on the second. I never thought of hooking two together.

06/21/2007, 07:43 PM	#1
DARKSILENTTYPE Registered Member Join Date: Apr 2005 Location: ST Peters Posts: 1,839	Is there a reason? Is there a reason that I shouldn't run two RO units at the same time . One after the other ?

06/21/2007, 08:30 PM	#2
zt444a Registered Member Join Date: Sep 2005 Location: Montgomery, NY Posts: 2,610	I can't think of a reason you can't, unless it possibly has something to do with the DI water running through your filters again. Why it would damage them I do not know.... Ask Dwayne at MS. He is a water treatment guru. If anyone would know for sure it'd be him. Achillestang2002 I think he is on here.... __________________ Howard DeBord " When the Boogeyman goes to sleep every night, he checks his closet for Chuck Norris. " Current Tank Info: None atm

06/21/2007, 10:23 PM	#3
Nanook Ancient Eskimo Legend Join Date: Mar 2001 Location: Saint Louis, MO Posts: 35,200 Blog Entries: 11	I run two 90gpd in series...no probs. Let's see some pics of that Zeovit tank!! __________________ Dave Owner of the largest coral in the Midwest! The wind blew, the chit flew, and then they came two by two. 'Scuse me while I kiss the sky. ~~~~~~~~~~~~~~ Current Tank Info: 375g & 470g mixed reefs, started April 1st, 2008

06/22/2007, 01:37 PM	#6
Nanook Ancient Eskimo Legend Join Date: Mar 2001 Location: Saint Louis, MO Posts: 35,200 Blog Entries: 11	I have mine in parallel....not in series. It is the standard Spectrapure 90gpd RO membranes. __________________ Dave Owner of the largest coral in the Midwest! The wind blew, the chit flew, and then they came two by two. 'Scuse me while I kiss the sky. ~~~~~~~~~~~~~~ Current Tank Info: 375g & 470g mixed reefs, started April 1st, 2008

06/22/2007, 10:47 PM	#8
sirreal63 Go Spurs Go!!! Join Date: Dec 2004 Location: Meadowlakes Texas Posts: 10,186	John I would imagine you can run the effluent line from the first into the membrane input on the second. I never thought of hooking two together. __________________ Jack No One has ever been seriously injured by using the search function. Cant stop, lose job, mind gone, silicon, what bomb, get away, pay day, make hay, break down, need fix, big six, clickity Current Tank Info: Reefing the Pentagon.

06/22/2007, 07:05 AM	#4
superfirefly Registered Member Join Date: May 2005 Location: St. Charles, Missouri Posts: 556	I would imagine you would want some sort of pump between them to create the pressure needed for it to operate correctly. I don't know that for sure but everything I have read states thta you need a certain amount of pressure for proper filtration.

06/22/2007, 10:42 PM	#7
Mykayel Registered Member Join Date: Jun 2005 Location: Kansas City, MO Posts: 586	my question is why would you want to? With a good set of filters and new DI resin you will get 0 TDS. So if you run it through a second filter what would you be accomplishing as you've already removed everything?? The only thing I can see that you would accomplish as you would be waisting a certain ammount of water as waist water through your second filter.. water that was perfectly good. And by creating more back pressure, you won't get as much flow through your initial filter there by making it less efficient. So the only thing I could see you gaining by doing this is making more waist water and less final product that isn't any better quality than if you were only using one filter. That's my thought but I could be wrong... anyone have a contradicting thought?