Jump to content

Don't want to see ads? Become a subscribed member.

More tds questions.


Recommended Posts



as you know I'm collecting the necessities for wfp. I will start with di filtering only due to that ro membranes are just so expensive and wont use it very much yet.


Now I've been playing with my tds meter and have tested lots of random things in and around the house as you do:oops:


I worked out that the water filter we use for our drinking water (one of those active carbon filtering thingies you fill up from the top and it slowly runs through) almost halfs my tds. :D Thats good news!!


I know you can buy the 10" filter housings and fit different filters, and before a RO if i understand correctly you have 3 filters. A 5micron filter, a 1 micron filter and a carbon filter.(please correct me if wrong)


Now my question is(finally) if i would use those 3 filters who are relatively cheap(£30-40 for it all) would that reduce my tds, now around 130 and make my resin last a lot longer? or is it a waste of money and space it only benefits if i actually have a RO?


Anybody who would just like to test with his TDS meter at all stages of his RO unit what the reading are? (bit of a big task sorry)


Thank you all, I hope this kind of makes sense.

Link to comment

Maybe just go online and look at how van mounts are set up. That way will give you an idea what kit you need as can be used static aswell.


Personally I would still use an ro/di set up in your situation and the bigger the ro/di set up you get the less time it will take to produce pure if on a water meter. If so ideally you should be looking at getting a decent 4040 ro set up or a 4021 at least as in this link http://www.ebay.co.uk/itm/like/221144451989?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=108&ff19=0

Link to comment

Have you actually measured that it halves your ppm as I would doubt it as all what the filter does is remove Chlorine. If you had that amount of Chlorine you would be dead.

Link to comment

I looked at the 3 prefilters with DI & it only reduced the TDS by 10ppm.

Also as they have the small RO tubing the water flow rate was reduced from 4.5L/min to 1.8, a hindrance to me as I like to fill my tank within an hour. I would them back inline if I was filling an IBC as the lower water flow prolongs resin.

Link to comment

As far as I'm aware, the 3 pre-filters don't really reduce the tds, they just remove the larger particles that can damage the membranes; in essence they preserve the membranes.

Link to comment

Don't want to see ads? Become a subscribed member.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Ad Blocker Detected

Please disable your ad blocker

Our forum relies on ads to pay for the servers and our time maintaining and running the forum.

Sadly running a forum like this is not free, and due to our popularity, we need servers that can handle the amount of traffic and resources our forum uses.


If you do not wish to see ads on our site, please consider supporting the forum with a membership subscription.