anyone know the ratio when making RO

[bckane]

How much water is good and how much is going down the drain.
Im filling 2 buckets of dain water to one bucket of RO/DI water does this seem right.?
Brian

 

[loyalrogue]

It depends on the type of membrane.
The average membrane produces about what you're getting.
I've started seeing some "High efficiency" membranes advertised recently that claim a 1:1 ratio.

 

[BigManBud]

There is a lot more waste water than "good" water. I can fill my washing machine up twice while making one brute 32 gal trash of RO water. I am not sure how much water it takes for my washer, but its a large capacity one. But as far as your question goes, I would say yes. I seem to remember something about a 4 to 1 ratio. I just thought it was a lot to send down the drain, so I tried to find ways to use some of it..washing clothes, watering plants, etc HTH

 

[bckane]

<a href=showthread.php?s=&postid=12219219#post12219219 target=_blank>Originally posted</a> by loyalrogue
It depends on the type of membrane.
The average membrane produces about what you're getting.
I've started seeing some "High efficiency" membranes advertised recently that claim a 1:1 ratio.

I use the best the filter guys carry...so your saying the better ones are based on a 1:1 ratio

 

[loyalrogue]

<a href=showthread.php?s=&postid=12219241#post12219241 target=_blank>Originally posted</a> by bckane
...so your saying the better ones are based on a 1:1 ratio

No, I'm just saying I've seen them advertised as such.
Whether they are actually "better" or not I can't say... less waste water, yes... better in the long run? Who knows?

 

[bawla47]

its dependent on the membrane eficiency but i think avg is like 4-5 to 1

i could be wrong tho, ill go check mine later, its a filmtec membrane just replaced. 75 gpd.

 

[bckane]

filmtec membrane same here 125 gl

 

[Buckeye Hydro]

4 waste:1 purified

anything between 3:1 and 5:1 is ok

 

[Lightsluvr]

Great in the garden

Great in the garden

If you have a garden or planting bed, you might consider using your waste water there... My trees and flowers love it! Rich in minerals, etc.

LL