Hi all just got my new 100 GPD RO/DI unit. My question is that I always thought that "any" RO unit produced more "waste" water than more "clean" water. Or is that that case? My unit is producing for every 1 cup of good water, 3/4 cup of waste water. I have gone over the instructions 3 times and made sure that all lines are connected correctly. I have not tested the water yet as I have not had time. Any help, info or thoughts would be great. Thanks.
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New RO Unit. Got a question.
- Thread starter Aquarist20
- Start date
I just bought a ro/di unit as well 100gpd yeah right. I seem to be getting about 1/2 that which all depends on your water quality. I have alot of waste water and very little "clean water" which from a friend of mine who has the same unit is experiencing as well. I have a 4 stage unit(5) if your count the last filter it goes though. I have tested the water before and after and it really makes a big difference! Maybe you had really good water to start with? Not sure but hope this helps.
Aquarist20
Does your unit have an adjustable flow restrictor? If so then all you have to do is open it up! The waste to pure water output should be around 3 or 4 to 1, So for every cup of pure water you should get 3 or 4 cups of waste. It sounds to me like the waste water is being restricted some how?
Does your unit have an adjustable flow restrictor? If so then all you have to do is open it up! The waste to pure water output should be around 3 or 4 to 1, So for every cup of pure water you should get 3 or 4 cups of waste. It sounds to me like the waste water is being restricted some how?
I have not had a chance to check TDS yet but hopefully tomorrow. I thought that it were being restricted also but I found nothing.
dwall174, I dont thing there is a flow restrictor but on the waste line there is a "flush valve" and according to the instructions it is only to flush the RO membrane.
I will have to check with the company and ask them what they think. Hopefully they will have a solution.
dwall174, I dont thing there is a flow restrictor but on the waste line there is a "flush valve" and according to the instructions it is only to flush the RO membrane.
I will have to check with the company and ask them what they think. Hopefully they will have a solution.
Your RO units DO have flow restrictors. If they didn't you wouldn't get any permeate flow (good water) from your RO unit.
If you run the unit with a low (<~3:1) ratio, you'll end up getting scale in the membrane and you'll ruin it.
The flow restrictor is typically inside the waste line. Disconnect it from the RO housing and look inside the tubing. You'll see what looks like a small plastic plug. It may or may not have a long capillary tube that extends inside the waste tube.
Maybe your membrane just isn't broken in yet. How much water have you run through it? How old is it? What is your water pressure? What is your water temperature?
Blue
If you run the unit with a low (<~3:1) ratio, you'll end up getting scale in the membrane and you'll ruin it.
The flow restrictor is typically inside the waste line. Disconnect it from the RO housing and look inside the tubing. You'll see what looks like a small plastic plug. It may or may not have a long capillary tube that extends inside the waste tube.
Maybe your membrane just isn't broken in yet. How much water have you run through it? How old is it? What is your water pressure? What is your water temperature?
Blue
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