Author Topic: Ro/DI unit WOW!!!!! (Read 3853 times)

Amstar · « **on:** February 11, 2009, 20:25:22 »

okay so I got a new ro/di unit. in the past I never had any waster water (because I didnt have it hooked it right) i got a new membrane, filters and a double DI unit.

how much waste water do you guys have? this will take forever to fill up a tank.

UD Flyer · « **Reply #1 on:** February 11, 2009, 20:30:41 »

Im not positive but generally there is 4 gallons of waste for one gallon of Ro/Di

cyberwollf · « **Reply #2 on:** February 11, 2009, 20:31:00 »

that was my first thought when i got one too. I feel bad for waste, so i do laundry with it.

slandis3 · « **Reply #3 on:** February 11, 2009, 20:31:31 »

I think most ro/di units ar 4:1 4bad to1 good. Im not 100% sure on that.

Amstar · « **Reply #4 on:** February 11, 2009, 20:43:45 »

that is just crazy. so when the water comes out of the "good" end does it just trickle out of the tube or do you have a constant flow?

mine just trickles out and the waste water is just flowing nice and steady

slandis3 · « **Reply #5 on:** February 11, 2009, 20:44:17 »

what size unit do you have?

UDJustin · « **Reply #6 on:** February 11, 2009, 20:54:54 »

I have a 50 gpd membrane and yes it just trickles out compared to the waste just flowing, and yes it is typical of most membranes to be a 4:1 ratio

ohioreef · « **Reply #7 on:** February 11, 2009, 20:55:32 »

Mine tends to trickle out the "good water" end, but I live on a well so my pressure is pretty low.

Amstar · « **Reply #8 on:** February 11, 2009, 20:59:10 »

its either 75 or a 100 membrane. is there anyway to get it to move faster?

UDJustin · « **Reply #9 on:** February 11, 2009, 20:59:32 »

no not really

verper · « **Reply #10 on:** February 11, 2009, 21:07:44 »

4:1 is correct.

Remember, by this time tomorrow you will have 75 to 100 gallons of RO/DI water

Amstar · « **Reply #11 on:** February 11, 2009, 21:12:52 »

and 400 gallon of waste water

ohioreef · « **Reply #12 on:** February 11, 2009, 21:15:54 »

Quote from: verper on February 11, 2009, 21:07:44

Remember, by this time tomorrow you will have 75 to 100 gallons of RO/DI water

Not necessarily. That will depend on his water pressure. I have a 75gpd membrane, but with my water pressure it takes a good 2 days to fill my 30g container.

slandis3 · « **Reply #13 on:** February 11, 2009, 21:18:53 »

Quote from: ohioreef on February 11, 2009, 21:15:54

Not necessarily. That will depend on his water pressure. I have a 75gpd membrane, but with my water pressure it takes a good 2 days to fill my 30g container.

Have you looked into adding a booster pump? That might help you out and get a little more good water.

Amstar · « **Reply #14 on:** February 11, 2009, 21:20:43 »

I just hooked it up. I have an inline pressure gauge I just havent hooked it up yet to see how much pressure I actually have.

how was I not having algae problems before this? I never had any waste water (b/c i didnt have a line hooked up).

150 gallon tank will take 2 days to fill and have almost 600 gallons of waste water?

ohioreef · « **Reply #15 on:** February 11, 2009, 21:25:03 »

Quote from: slandis3 on February 11, 2009, 21:18:53

Have you looked into adding a booster pump? That might help you out and get a little more good water.

Yes, I have, but at the price they want for one I can be patient!!

Amstar · « **Reply #16 on:** February 11, 2009, 22:05:50 »

can a bad ro membrane be a cause for more rejected water than good water?

slandis3 · « **Reply #17 on:** February 11, 2009, 22:06:46 »

Yea there a little pricy .

UDJustin · « **Reply #18 on:** February 11, 2009, 22:15:26 »

Quote from: Amstar on February 11, 2009, 22:05:50

can a bad ro membrane be a cause for more rejected water than good water?

yes

verper · « **Reply #19 on:** February 11, 2009, 22:18:03 »

If your unsure, test. Fill a gallon jug with the waste and you should have about 1 qt of RO.

micki · « **Reply #20 on:** February 12, 2009, 13:44:02 »

We put a booster pump on ours and it made a huge difference in time! I would have to ask Randy about the difference in waste water amount.

Amstar · « **Reply #21 on:** February 14, 2009, 05:04:51 »

well I have a problem. I filled the entire washer up of waste water and got less than a gallon of good water.

what would cause this? low water pressure through the ro membrane? a bad membrane? just really crappy water?

Amstar · « **Reply #22 on:** February 14, 2009, 09:41:43 »

could it be the flow restrictor coming off of the ro membrane (the waste line)? maybe I need to restrict it more and this will cause less waste water?

I need to hook up my dual tds meter to see what the waste water readings are.

ohioreef · « **Reply #23 on:** February 14, 2009, 10:00:56 »

Do you have an adjustable flow restrictor? If so, I would try restricting it.

If not, then it is possible that your flow restrictor is not matched to your membrane.

verper · « **Reply #24 on:** February 14, 2009, 20:22:53 »

Your flow restictors can be the problem, a bad membrane, or low water pressure.

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Author Topic: Ro/DI unit WOW!!!!! (Read 3853 times)

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