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Old 06-12-2012, 02:04 AM   #1
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I finally got RODI unit from purewaterclub.com. It is 6 stage 100GPD. Instalation was not a breeze as manufacturer claims. First, under a sink adapter that should be attached to cold water feed line was wrong size so I had to go to Lowes for a new one. $14 later I was ready to pump some water into the unit. RODI came with quick connections so hooking it up was quite fast. At first it leaked at almost every possible connection, GGRRRRRR.!!!!
After solving that problem I realized that pure water pressure is very, very, very weak. It takes about a minute to fill up one cup. Here comes the question! Do I have enough PSI to run RODI efficiently? I guess not! I have to get pressure meter to check it.
From what it was going to be on budget 30g FOWLR build, it's becoming hi-tech mega million operation ;-$
I guess my next step will be measuring that pressure and getting a booster pump. Oh well, my two other fresh water tanks will benefit from that system so I guess it is worth investing in it.
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Old 06-12-2012, 02:06 AM   #2
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It should be a steady stream comming out of the pure water tube. Not a powerful stream, but it should not be dripping. The waste water produces much more water.. Probably at least double which sucks. I wouldnt invest in a pump, you just need to be patient...
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Old 06-12-2012, 02:33 AM   #3
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Quote:
Originally Posted by Nu-Nu the eel
It should be a steady stream comming out of the pure water tube. Not a powerful stream, but it should not be dripping. The waste water produces much more water.. Probably at least double which sucks. I wouldnt invest in a pump, you just need to be patient...
At this point looks like ratio of waste to pure water is 10:1

EDIT: well, maybe it's more like 3:1 but flow of both waste and pure water is pathetic.
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Old 06-12-2012, 02:59 AM   #4
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Yup... It takes a while :/ just like mine!
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Old 06-12-2012, 03:22 AM   #5
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If you're hooking it up to drink you'll need a storage container to get any decent on-demand flow for a short time. If the water pressure from your sink is less that 40psi or so I'd recommend getting a booster pump.
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Old 06-13-2012, 10:17 AM   #6
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Quote:
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If you're hooking it up to drink you'll need a storage container to get any decent on-demand flow for a short time. If the water pressure from your sink is less that 40psi or so I'd recommend getting a booster pump.
I ordered 3 gallon tank, preasure gauge, flush kit.

I ran a gallon per hour test yesterday. RODI filled 5 gallon bucket in 1 hour 40 minutes, producing 13 gallons of wast water. It is 100 GPD system so it should produce around 4.1 gallon per hour.
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Old 06-14-2012, 01:32 AM   #7
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Do you plan on using the water for personal drinking? If so you may need to T off your system and install a valve so that you're only drinking RO water. That way you can drink RO water and use the valve to switch it to RODI for aquarium use.
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Old 06-15-2012, 01:04 PM   #8
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Quote:
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Do you plan on using the water for personal drinking? If so you may need to T off your system and install a valve so that you're only drinking RO water. That way you can drink RO water and use the valve to switch it to RODI for aquarium use.
That is exactly what I am going to do!
Thanks for advice.
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Old 06-15-2012, 01:15 PM   #9
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A lot has been published on drinking RODI water and the negatives and/or non-issue with it. Personally I wouldn't chance it. I'm not a fan of the taste of RODI either. RO seems to taste better....at least for me.
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Old 06-15-2012, 03:17 PM   #10
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I don't know that it makes you feel any better, but I got the 100gpd 5 stage system from them and had similar issues. The undersink adaptor they have is just wrong, I had some leaks, and I think the shutoff valve was installed incorrectly. I also wanted the system to run from left to right given where I was installing it, so I had to dismantle it and switch everything around to get it right. Mine has been working properly for about 9 months now though. If I knew then what I know now, I'd have paid the little extra to get the one from Bulk Reef Supply.

It might be that your low pressure is due to having air in the system which hasn't been purged yet, but I think after 5 gallons you'd have cleared it. If you know a plumber, maybe they can check your incoming pressure for you or you could borrow a pressure gauge from someone in a local reef club.

Good luck!
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