[Brownie10]

Just fitted my merlin today (second hand). The reading before going in to the di vessel was 140ppm (from mains of 320ppm) but I let it run for about 10 mins and now its 38ppm. Is this good enough?

I ask because I dont want to start using my resin until i know thats the best (ish) I can get for a hard water like mine.

Any advice would be much appreciated.

[AuRavelling79]

Seems high to me - my ro-man is 400 in and 10 out before the DI.

My DI (10") vessel starts at 000 and I run it until it reaches about 008 and then change the resin. This vessel goes thru a second one which I change at 003.

When my membranes get tired they creep up to about 20 and then I change them. Once a year for me.

[MSTAV]

my merlin is the same mate. dead on 38ppm before di, and 410ish ppm before ro. I asked the same question a while ago and it seems to be the norm with merlins.

Mike

[Steve Weatherley]

I have a merlin and am getting the same readings as you. My input from the tap is 380 ish

[Brownie10]

Thanks for the help everyone

Did you guys have a problem when it came to polishing it then. As in, you are going through a lot more resin?

Also how do you know when the membranes need replacing. Is it just a gradual creep up of your ppm before the di vessel.....

[Brownie10]

Is it even possible to get it to 000ppm in our case (hard water and merlins)?

[MSTAV]

i have had mine nearly a year now and havn't had to change a thing and i pure 400 litres per night.  change resin every 2-3 months so quite quick i guess. thats using 2 di vessels

mike

[Brownie10]

I should be okay then

Out of interest why is it that you have two vessels?

[dmlservices]

hi brownie
should have gone for a ro man with your tds mate, mine is around 320-350 in , 004 out , looked at the merlin but was advised not to go with it, produces water quick , but apalling waste to product, and does not bring tds down enough- costing a lot more in resin changes. after going through di, mine comes out at 000, and resin lasts ages.


daz

[Brownie10]

What model did you get, and how much was it?

Got work but not in a hurry, so could still sell it and change systems if its worth it...

[[GQC] Tim]

Sounds about right, I've always been told that Merlins are great for producing water quickly, but are not as effective in removing impurities, hence the higher TDS.

[dmlservices]

hi
i went for a 200 gpd unit , it feeds into a 1000 ltr ibc, my van tank is 500 ltrs,and i never run out of water, ro man sell them , depending on your water usage you can get same or go bigger.
www.ro-man.com .

daz

[Frank pole]

I was getting 426 in & 39 out from my merlin setup so I sold it on ebay! I bought ro-man kit and the last time I checked I was 423 in & 9 out.