[LWC]

i have my own bore hole and it comes out pretty clean at 050 ppm, i run it through an RO and it comes out at 000 then through the DI

i was wondering if i was just to get a big DI vessel how long it would last on 050 ppm?

[Alex Gardiner]

If you use twin in-line canisters swapping the last for the first and refilling the first each time TDS rises, you should get between 10,000-20,000 litres from a sack of resin. It really depends on the dissolved solid makeup of your bore hole water. 10,000 should be a minimum though.

[LWC]

cheers alex,, well i work 4 days a week and use around 400 litres a day, so minimum would last me 2 - 3 months, ok cheers

ill carry on using my RO on that one cause i aint touched the resin in 15 months now and still at 000

ok, sorry for another question, if i was to run rain water through a DI how long would that last, saying the rain water was about 010

ive just got 2 ibc tanks and am gonna start collecting it, pumping it into my new van...if i ever get one lol. ill run the rain water straight into the tank in the van then pump it though a DI

[Alex Gardiner]

With your rainwater you should get about 50-70,000 litres from a sack of resin (using the twin canister system)

[LWC]

superb, cheers alex, i WILL be doing that, ill take a look on your site

[macmac]

Tip

If using the 2 vessel method it pays big time to use virgin resin, i.e. not purolite.

To be honest, with the stats you quote lwc, i wouldn't go near an RO, i'd have the simplicity & benefits of pure water on demand with a twin DI set-up. Have the vessels in the van to pump through & just fill your tank with tap water at full pressure in approx 10/15 mins, job done
My stats are very similar to yours but my tap tds is 096ppm & i use 2 bags of resin per year!

tony

[dai]

With your rainwater you should get about 50-70,000 litres from a sack of resin (using the twin canister system)


If using low TDS rainwater, you will gain very little by using the two vessel's in line.
Once the water coming from vessel 1 is reading the same TDS as the source ie rainwater, you save nothing. As your rain water could be as low as 6 or 7 ppm, as soon as you get the same reading from vessel 1, you save nothing.
You could continue to use it for your 50 ppm tap water until the reading comes out the same 50ppm. Dai

[macmac]

You could continue to use it for your 50 ppm tap water until the reading comes out the same 50ppm. Dai 

With a virgin resin like dowex it would take ages for the 1st vessel to reach 50ppm, especialy if you backflush/shake the vessel. mine never gets to 50ppm before the 2nd vessel needs changing anyway. I swapped mine over when the 2nd vessel read 001ppm 7 WEEKS AGO, It now reads 23ppm & i haven't shaken it yet, when i do, it will then go back down to about 5ppm for a while.

tony

[LWC]

youve confused me dai?

[Paul Coleman]

Tip

If using the 2 vessel method it pays big time to use virgin resin, i.e. not purolite.

To be honest, with the stats you quote lwc, i wouldn't go near an RO, i'd have the simplicity & benefits of pure water on demand with a twin DI set-up. Have the vessels in the van to pump through & just fill your tank with tap water at full pressure in approx 10/15 mins, job done
My stats are very similar to yours but my tap tds is 096ppm & i use 2 bags of resin per year!

tony

I am currently using purolite.  Does purolite not last as long then?  I thought the term "virgin" regarding resin just meant that it hadn't been treated with acid(s) and re-cycled.  Are you saying that purolite is a recycled resin?
If it is then I will switch to another brand when my current stock is expired.  That should be quite a while though as I have a bag and a half of it at the moment.

[macmac]

If you're just polishing ro water shiner then to be honest, the saving isn't going to be as big or as instant by changing brands. Where the BIG savings are to be made is with a twin DI only set-up, as virgin resin will keep a low tds for much, much longer than regenerated resin.

tony

[Paul Coleman]

If you're just polishing ro water shiner then to be honest, the saving isn't going to be as big or as instant by changing brands. Where the BIG savings are to be made is with a twin DI only set-up, as virgin resin will keep a low tds for much, much longer than regenerated resin.

tony

Perhaps it wouldn't be such a saving as you say Tony.  After the RO, the water going into the resin vessel is 007 - 009 once the first few litres have gone through.

[stevekennedy]

Purolite do many types of resin

Try MB400.

You will find it is really good stuff