[WISEOWL]

Okay, I have bought three new membranes to refresh my RO unit and have replaced them successfully.

However...

In order to re-screw the seal I decided to simply remove the casings from the housing for ease and when I came to re-attach the piping I think I got it right but wanted to double check. The query is with the casing that has a t-bar junction really, the piping is usually all tucked away beneath but with the changing of the membranes all that has come out and is exposed so 'looks' different.

I have flushed and produced water that I have used yesterday and today with no problems TDS wise but I would have thought it might have produced more in the time it has been on. Am I maybe by-passing a membrane?

[WISEOWL]

Just found a pdf file courtesy of RO-MAN and going to give it a whirl.

For reference.

http://www.ro-man.com/instructions/RO-MAN%20Reverse%20Osmosis%20manual%20for%20200%20and%20300%20GPD%20systems.pdf

Thanks.

[Spruce]

Just found a pdf file courtesy of RO-MAN and going to give it a whirl.

For reference.

http://www.ro-man.com/instructions/RO-MAN%20Reverse%20Osmosis%20manual%20for%20200%20and%20300%20GPD%20systems.pdf

Thanks.

Your system may also be plumbed in differently to that shown in Ro-mans diagram. My R/O has three membrane housings and each membrane is supplied by a common supply from the carbon/chlorine filter. All the wastes are coupled to a single waste exit through a single resistor and all the pure membrane outlets are also coupled together. What this means is that each membrane has the same 'quality' of water to filter.

The RoMan diagram feeds the waste from the first membrane into the second and the second into the third. As the waste goes into the next membrane the TDS goes up, meaning that that membrane works harder than the previous one.

From a manufacturers point of view the RoMan diagram is cheaper to assemble as they don't need the coupling connectors. They will argue that their way is best as it reduces waste, but being a cynic, I'd go for the 'cheaper to manufacturer - more money for them' stance.

Spruce   

[WISEOWL]

Yes it is, if it helps the membrane with the waste valve has a double inlet and thats the bit I'm having problems with.

[WISEOWL]

Okay, I basically need to know where the outlet from the pre-filters goes.

The three membranes are all plumbed up together, it's just a case of which one goes first and the rest will follow.

I am thinking the membrane with the waste valve goes first as it has a double inlet to feed the other membrane?

[WISEOWL]

*BUMP*

Only because I'll be filling up tomorrow, if no help available I shall plumb it how I did before that was okay.

My main concern is the outlet from the pre-filters, does it go into the main membrane (with the flush valve) or into one of the two 'bonus membranes' that make up a 300 GPD?

The two 'bonus membranes' have a connected waste pipe that needs screwing in somewhere too.

[Spruce]

Okay, I basically need to know where the outlet from the pre-filters goes.

The three membranes are all plumbed up together, it's just a case of which one goes first and the rest will follow.

I am thinking the membrane with the waste valve goes first as it has a double inlet to feed the other membrane?

Sorry
I forgot about this post - apologies.
I have one sediment filter leading off into 1 carbon filter. The remaining 3rd filter is a resin filter. Many R/O's now have 2 carbon filters and use a separate di vessel after the R/O but before the IBC tank.

OK. So I have a plastic tube from my carbon filter to a "T" piece which connects to the pressure gauge. The plastic pipe then leads off to a 4 block connector. So this becomes an inlet supplying 3 outlets, each coupled to the inlet on each membrane housing with a short length of plastic pipe.

Each pure membrane outlet has a plastic pipe which leads to another 4 block connector - so 3 inlets to 1 outlet. This outlet then goes to the resin container inlet. The outlet of the resin container goes into my IBC tank. The wastes are also coupled together via another 4 block connector - 3 inlets to 1 outlet. This then goes to waste. But before it goes to the drain it has a restrictor with a by pass flush valve.

Hope this helps.

Spruce

[Spruce]

I know this can get a little more complicated when they start using "T" pieces instead of a single 4 connector block.

If I remember correctly I helped one of the local guys with his R/O and they used T pieces to couple things up. So the first T piece was coupled to 2 R/O waste outlets = 2 inlets to 1 outlet. A short piece of plastic from this outlet became the inlet of the next T piece. The remaining waste outlet from the 3rd R/O was coupled into this T piece = 2 inlets at the connector and the remaining connector became the outlet to waste in which the restrictor and flush valve was fitted. This T piece arrangement could also be used on the pure and inet pipes as well, so you could have 7 T pieces tucked away to confuse you. If they didn't use different colour pipes for main, pure and waste then it does get very confusing.

Spruce

[WISEOWL]

Thanks for the reply, it seems like you have a much more serious piece of kit than I have. Mine is a standard 300GPD from Pure Freedom and is set up thus.

All three membranes couple up to one pure outlet, no problem.

Two of the 'standard' membranes couple up to the same waste outlet that needs to be screwed in somewhere, the third membrane is the actual waste pipe complete with flush valve. The 'flush valve' membrane is the only one with a "T" piece inlet, the other two have single oulets.

So what I need to know is which of following goes where:

* Initial water in from three pre-filters
* The outlet from the two waste membranes
* The six inch double ended pipe that obviously goes in the "T" inlet but then to which other membrane?

Wish I had memorised the bloody thing better!!!! Regretting it now!!!!

[Spruce]

I tried to up a sketch but the system says the upload folder is full.

[WISEOWL]

I don't have a pressure gauge or use DI, it really is a simple unit.

If I wasn't at my brothers drinking I would sketch out the connections on paint myself!

Just feel odd putting the waste from two membranes back into another, though that is how the unit came.

[Spruce]

Tell you what I did see once. The first 2 membranes coupled together in parallel, and then the last membrane being fed by the waste from the first 2 with the outlet of this membrane to the restrictor and then the drain.

I could be wrong but I think that was a Pure Freedom R/O.

[WISEOWL]

Bingo!!