ro/di question

[jessp]

I have an ro/di unit that i bought used from a fellow reefer. I was hooking it up and got it running. the question i have is there are two places that water is released. the feed line goes in the "in" hole and the "out" line i think is where the clean water is released.

i'm thinking that the third hose that releases water is ro only and not di, kinda like waste water.

any info is appreciated. I have had this thing for months and need to get it running.

thanks,
jess

i'll post a pic later.

 

[Rogger Castells]

Out of the r/o canister (white one sitting horizontally on top) has one inlet and two outlets, one is the r/o the other is the waste, it is easily identifiable, the waste produces water 5 times faster than the r/o

 

[jessp]

thanks thats what i figured. just wanted to make sure.

the waste is the one that walter suggested using for a bird bath or dogs water.

 

[Rogger Castells]

i don't know about dog water but bird bth yes

 

[AJtheReefer]

Rogger,
Do you find the water pressure adequate in Weston for RO/DI water production. I live in Weston as well, and alway had mixed results with water coming out of the RO membrane. Thx

 

[Rogger Castells]

<a href=showthread.php?s=&postid=9495542#post9495542 target=_blank>Originally posted</a> by AJtheReefer
Rogger,
Do you find the water pressure adequate in Weston for RO/DI water production. I live in Weston as well, and alway had mixed results with water coming out of the RO membrane. Thx

I am not sure what are you refering with mix results, I think my r/o works fine but I do have pressure issues in the house when my sprinkle system is turned on, this only happens twice a week for about 45min so I haven't really put much thought on the effects of this lower pressure over the r/o production.

 

[jessp]

i have a pressure gauge on my setup, what should it read when i am running the water wide open?

 

[Rogger Castells]

I think between 45 & 60 psi

 

[AJtheReefer]

<a href=showthread.php?s=&postid=9498386#post9498386 target=_blank>Originally posted</a> by Rogger Castells
I am not sure what are you refering with mix results, I think my r/o works fine but I do have pressure issues in the house when my sprinkle system is turned on, this only happens twice a week for about 45min so I haven't really put much thought on the effects of this lower pressure over the r/o production.

sometimes I get 15-17 tds going out of the ro membrane and sometimes I get 5-8 (which it is a high range). My tap water always seems to be around 85-95 TDS. Are you seeing the same tds out of the tap water?

 

[jessp]

what is the acceptable range for TDS? obviously the goal is 0 how high before the filters and membrane can be chaned.

 

[45commando]

Hey Jess,
the TDS reading for just an RO unit will depend on the quality of your initial tap water(as it can only remove a proportional amount of TDS),but you want to shoot for at least under 10.If you're running DI also,then you really should be reading zero & I would change the resin when you get up to a reading of 2 or 3.HTH

 

[Buckeye Hydro]

Re: ro/di question

<a href=showthread.php?s=&postid=9495339#post9495339 target=_blank>Originally posted</a> by jessp
I have an ro/di unit that i bought used from a fellow reefer. I was hooking it up and got it running. the question i have is there are two places that water is released. the feed line goes in the "in" hole and the "out" line i think is where the clean water is released.

i'm thinking that the third hose that releases water is ro only and not di, kinda like waste water.
i'll post a pic later.

What brand name is it? If it would be helpful, send me your email address and I'll send you a set our our instructions for a similar configuration.

Russ @ BFS

 

[jessp]

thanks everyone, i ordered a tds meter from walter at awi. it should be here by tuesday or wednesday. at that time i can determine how mine is performing and what steps need to be taken to get the purest water possible

 

[Rogger Castells]

<a href=showthread.php?s=&postid=9499934#post9499934 target=_blank>Originally posted</a> by AJtheReefer
sometimes I get 15-17 tds going out of the ro membrane and sometimes I get 5-8 (which it is a high range). My tap water always seems to be around 85-95 TDS. Are you seeing the same tds out of the tap water?

Yes , I know what you mean, and that is bound to happen if you measure the TDS out of the r/o membrane because the membrane is going to take care of approx 90-95% of the tds's only, maybe less depending on your membrane.
Your tap water tds will fluctuate up and down, your DI cartridge will take care of all remaining TDS's.
I shoot for 000 TDS on the DI outlet I change the Carbon and sediments filters twice as much as the DI resin, I also have a 2 DI canisters that I rotate.
I only change one at the time and transfer the second cartridge to the first canister each time I change it.