Ro/di

[fancyfish]

Hi everyone. my ro is set up so that my sump automatically fills when needed. I have a float valve both in the sump and in the barrel that I store water. my question is this: How much waste water should be made on a daily basis? it appears that my unit makes too much water. please help me with this. I am wondering if my auto shut off valve which is hooked onto the unit may be defective? thanks in advance

 

[twilliard]

My RO is
1 gallon waste to one gallon RO

 

[chris&barb]

My RO is
1 gallon waste to one gallon RO

wow how do you do that? typical it more like 4 to 1

 

[twilliard]

That is what the installer said

and I thought that was outrageous

 

[plack]

It depends on your pressure the higher the pressure the less waste .You can get a booster pump but it will only help and improve the ratio I doubt many get 1 to 1 ratio but 3 to 1 or less is possible

 

[twilliard]

Well the spec book says 1:1 on soft water which I have. I guess I payed to make 1:1

$750 installed :O

So to answer the question at hand, your waste water is dependant on your system.

 

[Brenden]

Never heard of a unit doing 1:1 on waste water even at $750. 3-4:1 is common. Mind sharing what brand and model?

 

[chris&barb]

i just saw this and he's only getting 1 to 1 with i dont even know who many membranes

http://www.reefcentral.com/forums/showthread.php?s=&threadid=878461

 

[twilliard]

Its the Culligan Water Tower

For all who is interested
http://www.freshwatersystems.com/support/Water Tower.pdf

When I was researching RO's I noticed that the waste water was enormous. I couldnt stand the thought of using 5 gallons of water to make 1
So I started calling around the local water services and culligan said they had just what I was looking for.
The wife about killed me for buying this (the total bill was 2400$ with the softner) but it was money well spent (for the softner

 

[Boomer]

If any of you guys want to do it right on a RO or RO/DI without paying an arm & leg and get a much better Recovery Rate, that guy (Jim, fahz) mentioned in that thead linked post is friend of mine. He lives down the street. He is also a reefer. Tell him I sent you and he will fix up up

http://www.thefilterguys.biz/

 

[fancyfish]

thanks. I think that my float valve may not be sitting correct in the sump or the resorvoir as my water never totally shuts unless I turn the unit off. thanks for the input

 

[brianblack]

Hi everyone. my ro is set up so that my sump automatically fills when needed. I have a float valve both in the sump and in the barrel that I store water. my question is this: How much waste water should be made on a daily basis? it appears that my unit makes too much water. please help me with this. I am wondering if my auto shut off valve which is hooked onto the unit may be defective? thanks in advance

In my case with the RO/DI unit I have-
If you have the float valve hooked to the output of the RO/DI unit the unit will always be trying to make water even though you have the output closed. The water won't be allowed to pass through the membrane (because you have that water path closed) and all the water will go through the waste line until the valve on the barrel opens again. If your barrel is big enough you can just fill it from time to time by turning on and off the RO/DI unit yourself. It will keep the sump at its required level.

 

[MikeS]

1:1 ratio is pretty amazing....sorry, gotta be the skeptic...what is the TDS, nitrate and phosphate of your yeild water? and how have you confirmed that it is 1:1 ratio? I have a good RO/DI unit, and at 65 psi, I get a 3:1 ratio...2-4 TDS, 0 nitrate, 0 phosphate....but for every gallon I make of that, I get 3 gallons of waste....confrimed with the bucket test....

MikeS

 

[Ed Hahn]

I have the same RO unit from Culligan. My TDS is .05.

 

[chris&barb]

I have the same RO unit from Culligan. My TDS is .05.

and a 1to1 ratio?

 

[burning2nd]

filterguys.biz is who i used, i bought the ocean reef 4 (5 cans total) and i have 0 TDS

 

[BuckeyeFldSup]

If you use an adjustable flow restrictor you can set the waste to permeate ratio at what ever you'd like. 4:1 is a recommended ratio. If you run it lower than that you will shorten the useful life span of the membrane. higher than that and you are needlessly wasting water.

Also note that if you have a static (non-adjustable) flow restrictor, and you have a 4:1 ratio during the warm season, your ratio will be higher than that if you get cold tap water temperatures during the winter. An adjustable flow restrictor allows you to bring it back down to a 4:1.

We don't recommend adjustable flow restrictors to homeowners looking to make drinking water - but we do recommend them to reefers who pay attention to their equipment.