How Many Stages Is Your Ro Unit?

[demonmagus]

Hi, just want to know about how many stages do most people have on their RO units, also would a 3 stage suffice?







thanks

 

[Mr Miagi]

Mine is a 3 stage RO/DI. 3 Stage is fine, but go DI too if you can.

 

[SkiFletch]

I have a 6 stage that I only use as a 3 . Just a sediment pre-filter, carbon pre-filter, and RO membrane. Get a TDS of 1-3ppm every time.

 

[Pheonix]

i got a 6 stage aswell use all stages though lol ppm usually 0-3

cheers

 

[cynos]

go t a 3 stage

 

[bobf]

go t a 3 stage

Mine's three with a DI unit and the TDS reads 0 or 1 after it's run for a little while.

More important than multiple stages, I think it's definately worth investing £20 in a TDS meter - that way you can keep a close eye on what your RO unit is actually doing, and when the membrane might need flushing/changing.

 

[robbhp]

i have a 6 stage ro unit and it works very very well. also have the di pod the more stages the better i think

ROB

 

[YoungFishBreeder]

I Have a 3 stage

 

[jeffery]

i also only have a three stage RO but if i were to do it agine i would have gone with the DI to

 

[Allen]

do these work straight off mains pressure or do you need a booster pump ?

 

[DarrenUnwin]

Allen,

Usually they work directly from mains pressure, I suppose it depends mainly on your local water company and the pressure they supply at.

One quick question for anyone whilst on the subject of TDS meters. At what point would you start to worry about the readings from you unit, i.e above 10 ppm, above 50 pmm. The reason for asking is that I have just purchased a TDS meter this weekend and water direct from the tap is 275 ppm and the RO water 6 ppm.

When the membrance needs replacing (had this one 18months) does the reading go up with a bang or is it gradual and at which point do you start shopping around.

Many Thanks for any replies

 

[SkiFletch]

If its RO only (no DI) then I'd say your membrane is working just fine. It'll be a quick process when the membrane gets full. One minute it'll be puttin out like 6 TDS, the next 20 and then prolly shoot up into the 50-75ppm range pretty quick with incoming water that dirty. Remember, try flushing the membrane first if you have a flush kit

 

[DarrenUnwin]

Skifletch,

Many thanks for the answer, for the time it takes its probably worth checking each batch, just in case.

 

[Allen]

Another RO question !

I am looking into getting a 6 stage 50GPD unit and plumbing it into my shed.

How does it affect the RO unit if you plumb the extra pipework in copper pipe ?

Doesnt copper kill inverts ?

Does the RO unit remove any copper present ?

 

[SkiFletch]

Running copper pipes to SUPPLY the RO unit is just fine. RO membranes remove copper from water. However if you plumb it with copper after water has passed through the unit you run the risk of re-introducing copper.