[Fieldsy]

1)
Just looked at ro man website and they have a schematic diagram of a 300gpd with the membranes in series, so each waste feeds the next, wouldn't this make the last membrane absolutely clogged much earlier than the previous 2, so when would you know when to change each individual membrane.

Is it not best to run them in parallel??, so they get changed at the same time.

2)
Once the water is pure and been through the ro/DI unit does it just flow from the DI through a 1/4" pipe to your butt/tank or do you fix a larger piece, like hose for example


thanks

Fieldsy

[Ian Lancaster]

I think the schematic must be wrong, or you're reading it wrong.  If you put them in series, you would still only (theoretically) get 100gpd.  they would have to be in parallel to turn a one membrane 100gpd into a three membrane 300gpd

[Fieldsy]

this was the one Ian, I'm sure I read on here that the green was waste and the blue was pure water??  red being the mains..............or have I got it wrong 

[Spruce]

Hi Fieldsy,

I agree with Ian that this diagram is totally wrong.

My system has been running successfully for the past 3 years and the 3 membranes are connected in parallel. The pure product then goes through the 3rd filter which is a resin filter to be polished off.

So the mains water initially goes through one sediment filter, one chlorine removal filter, the 3 membranes, and finally the resin filter and out to storage.

It could be that some units I have seen use one sediment filter, then 2 chlorine filters, the 3 membranes connected in parallel and then the resin filter is a separate DI Vessel either before IBC storage or in the van.

Spruce

[wightsurf]

I have mine set up as the diagram piccy shows and it works ok for me. I started out with 1 membrane and upgraded from there. I bought ro unit from Ro Man and then phone them about the upgrade of which they sent me that Piccy.

[Fieldsy]

blimey!!!, contradictory opinions on this............so which is right?or are they both correct??

[Nathanael Jones]

The reason RO-Man recommend this setup is to reduce waste water. Theoretically with good pressure a setup like this can produce 1.5 parts pure to 1 part waste.

[ftp]

That's how mine has been set up for the last two and a half years. What's the alternative method of setting the system?

[wfp master]

ro-man stands for rip off man stay away from him.

[Fieldsy]

That's how mine has been set up for the last two and a half years. What's the alternative method of setting the system?

As far as I have been reading, the other option is to set them in parallel.

.ie...  3 feeds into the membranes , 3 feeds out for waste "T" into one pipe, 3 feeds out for pure water "T" into one pipe

I'm just curious which is the better option, if in fact there is one and why.

I was to believe that the first option saves waste..............but the last membrane is basically collecting all the "crap" from the previous two membranes and is liable to deteriorate quicker???

[karygate]

i want to know aswell. does one produce faster than the other

[ftp]

I would have thought the first one would get the brunt of the crap.