[sham33]

Hi, if any 1 has bought a merlin ro system can u post your in and out tds readings in here so we can compare.

My tap water is 250ppm before and 45ppm after passing through RO. Im just interested to see what every 1 else is getting because my reading seems too high.

[Duke]

I wouldn't worry too much....mine soared up to 200 when I hadn't checked it for a while....still no complaints though...(it's back to normal now)

[sham33]

  I dont mean when it starts up, its always a high reading for a few minutes. I mean its a constent 45ppm once its running at its optimum.

[thewindowcleaner1]

My water goes in at around 275  and comes out between 19 to 22, then through resin bed comes out Ooo,
Run the system for about 15 after starting through bypass (to garden pond)this clears the standing water and flushes system (fish love it)
I also have an additional carbon filter before the RO don't know if this makes a diffrence?

Alan

[Andrews_Water]

Alan,

GE are quite specific in their instructions with the Merlin.  If used commercially, and not just for small amounts of domestic drinking water, an additional carbon prefilter is necessary, to prevent damage to the membranes from chlorine in the tap water.

Yours, Andrew

[rosskesava]

Sorry to sound daft but what is ppm?

Thanks

[garry]

Sorry to sound daft but what is ppm?

Thanks

ppm= parts per million.
sham33 45ppm is far to high my reading is 9 afther ro ooo afther resin and i live in hard water area (thames valley)

[sham33]

Hmm well i dont know then. I have the extra carbon filter. Maybe the manafold/backplate if faulty.

[rosskesava]

Sorry me again

Thanks re the parts per million.

We're thinking in terms of WFP. It's all a foreign language to me.

What does :-

45ppm is far to high my reading is 9 afther ro ooo afther resin and i live in hard water area (thames valley)

mean?

Especially the resin bit? And why does hard or soft water affect anything?


Thanks again.

[garry]

Sorry me again

Thanks re the parts per million.

We're thinking in terms of WFP. It's all a foreign language to me.

What does :-

45ppm is far to high my reading is 9 afther ro ooo afther resin and i live in hard water area (thames valley)

mean?

Especially the resin bit? And why does hard or soft water affect anything?


Thanks again.

ok here goes i try my best to answer  45ppm this is the reading he gets afther the water has passed through the carbon/sediment filters
and the membranes which i think is far to high.
you pump normal tap water through the filters and the carbon/sediment filters remove the clorine (spelling) then it passes through the membranes which removes most of the other crap by this time the water should be about 98% pure then it goes through the resin which shoud make it 99.9% pure.
if you live in very soft water area you may not need a ro system you can pump the water straight in the resin and get pure water. hard water area you could do the same but it would cost a fortune in resin 25kg bag cost about £70 and it would not take long to go through this some one told me it would cost about£30 of resin to make about 500 liters of pure water thats why you need ro system in hard water area .have a look at ro-man.com they do some good deals on ro systems hope this helps.

sham33 i mean what i say that reading of yours is far to hign afther its been through ro reading should be about 8 to 15 tops if your reading is 45ppm your gonna go through a lot more resin i had this happen to mine when i first got ro first day reading 10 next day reading 48 my problem was the membranes had gone within 24 hours so got new ones problem solved ..how long you had it

[sham33]

Only had it under a month i think. They did test membranes and said they were fine. Dunno really, theres a problem somewhere is really annoying because its not a complecated piece of kit really.

[rosskesava]

Hi Garry

Thanks for the info and www.ro-man.com looks about the best website I've seen so far.

It's all becoming a bit clearer.

Cheers

Ross

[Ian Rochester]

There was a thread about this a while ago, http://www.cleanitup.co.uk/smf/index.php?topic=6695.0

If the Merlin is only getting your reading down to 40-50ppm then that means your DI unit still has a fair amount of work to do to get it to 000.

Andrews Water Treatment have a unit called a Rhombus Wizard for £544 which may be a better option.  Hopefully he will have one at the show on Saturday!

[Andrews_Water]

Hi,

I've got to come clean !  Our Rhombus Wizard IS a General Electric Merlin, which we've tweaked to reduce the amount of water sent to waste, and with a top-of-the-range dual in-line TDS meter thrown in for good measure.  It will be demonstrated on our stand at Newcastle on Saturday, just to show how neat it is, and the fantastic rate at which it produces quality water.  It won't get you down to zero TDS, but WILL remove 93 to 98% of what's there to start with.  You'll probably still need a demin cartridge or column for final polishing.

Also on our stand is a superb 4000 psi 14 L/minute pressure washer, and a 24" stainless steel Whirlaway, which cleans block pavers at a rate of knots.  We're also showing Omnipole's Powerpole gutter cleaning stuff, and a great little wireless camera + hand-held monitor, which enables you to inspect gutters very easily with your feet planted firmly on the ground.

Finally, all of our equipment can be leased at advantageous rates, over either three or five years.

Hope to see you all on Saturday.

Yours, Andrew

[AuRavelling79]

Mine's from aquatec (Peter Fogwill)

Tap water (V Hard) 400ppm
In reading 10 - 20 - ppm
Out reading 000 for about a month, then 001 for a month, then 002 for a month then at 003 I buy a litre of resin for a fiver from Peter and start again. ( I use about 200 litres per day)

My system produces about 20/25 litres per hour of 000 water.

(I always run the system for about five minutes to get the "In" reading down to 10/20 before feeding through to the resin.)