The last chamber of my RO unit doesnt fill up with water ( the DI Resin chamber) I still get product water but I dont know if it is as much as I should be getting. My current water pressure is 40 psi but I can adjust that up to around 60. Only thing with that is then I dont get any waste water and I heard that can destroy you membrane pretty fast. I've tried takin the DI chamber apart and realigning the tube with the resin in it but it still wont fill. Anybody know what the issue is?? Thanks.
Reverse Osmosis Problem
- Thread starter mdog3000
- Start date
AZDesertRat
In Memoriam
The DI chamber does not need to fill completely, the water flows up through the middle if its a vertical canister. If you are adjusting your pressure by restricting the waster stream STOP. Thats not the way to do it and will ruin your membrane. The waste should be set at 4:1, 4 gallons of waste for every 1 gallon of product or good and stay there. 40 psi is low for an RO but will work.
AZDesertRat
In Memoriam
What valve are you opening? You should have a flow restrictor on the waste line which is set at 4:1 waste. It may be a tube with something like 750mL stamped on it or it may be a piece of spaghetti looking tube stuck inside the 1/4" waste tubing but normally they are non adjustable unless you specifically have an adjustable flow restrictor.
Get a measuring cup or other graduated container and a watch or clock and time the flows from each. It should be 4:1 for best life and quality.
Get a measuring cup or other graduated container and a watch or clock and time the flows from each. It should be 4:1 for best life and quality.
AZDesertRat
In Memoriam
Do you have an adjustable flow restrictor? Normally there is nothing to adjust on a flow restrictor. Do you have a flush valve and are you opening it to flush? They are two different things if so and the flush valve should be in the closed position for normal use and only flushed for a minute or two just before shutting the unit off.
At 4:1 you should only see a few pound pressure drop if your filters are clean and the membrane is new. You say you are getting the product water you think you should? What is your incoming pressure and temperature and what membrane do you have? The anticipated flow is easy to calculate.
At 4:1 you should only see a few pound pressure drop if your filters are clean and the membrane is new. You say you are getting the product water you think you should? What is your incoming pressure and temperature and what membrane do you have? The anticipated flow is easy to calculate.
