[Shrek]

Hi all , my tap water TDS is now 250 ppm , I changed resin on the 9th July , it's now gone upto 001ppm ( 1 litre vessel ) . At this rate I will be using 52 Ltrs a year , is this about right?

[Arnold Palmer]

I assume it's going through an RO first??

Either way I'd say a litre a week isn't too bad.

Buy a bigger bottle and go double-DI if you want to save on resin. A 1L bottle isn't big enough.

[Shrek]

Yeah , sorry should of said , it goes through RO first . Does tap TDS vary throughout the year?

[Arnold Palmer]

Yeah , sorry should of said , it goes through RO first . Does tap TDS vary throughout the year?

Depends on your supplier. Mine doesn't.

[slap bash]

You do ask a very difficult question.  There are so many factors that come into play. The first question I would like you to answer is. At what tds do you feel happy to clean glass with. If you change your resin like many do at the first sign of a lift of tds  0/1 they change resin. Or will you be wise and leave it till at least 10.  I personally only change resin some were between 10 and 15 tds and have never had a problem. But this is in the case of my water in the South of England.

[Perfect Windows]

Yeah , sorry should of said , it goes through RO first . Does tap TDS vary throughout the year?

Lowest here 250, highest 415.

Vin

[dazmond]

tap tds 029.

3-4 bags of resin a year(£240-£320)

7000L-8000L   a month(roughly) x 10 months(2 months off a year)=70,000-80,000L per year.

DI only.

[Flash..]

About a year ago I fitted a tap on my ro outlet so the first 10 or 20 litres go to waste when I start mt 4040 up at night.  This has made a dramatic effect on the amount of resin I use.

[SeanK]

Shrek if  I can remember you said the TDS after your RO was around 7ppm, so the answer is you're well above norm
even for a heavy user of water.
At your TDS you're  talking about one or two 11litre vessel fills a year depending on usage and how OCD you are on keeping the
water at zero.

[Shrek]

You do ask a very difficult question.  There are so many factors that come into play. The first question I would like you to answer is. At what tds do you feel happy to clean glass with. If you change your resin like many do at the first sign of a lift of tds  0/1 they change resin. Or will you be wise and leave it till at least 10.  I personally only change resin some were between 10 and 15 tds and have never had a problem. But this is in the case of my water in the South of England.

I like to keep it as close to 000 as possible

[Shrek]

Yeah , sorry should of said , it goes through RO first . Does tap TDS vary throughout the year?

Lowest here 250, highest 415.

Vin

Cheers vin , I could've sworn my tap water TDS was a lot lower a while back

[Shrek]

tap tds 029.

3-4 bags of resin a year(£240-£320)

7000L-8000L   a month(roughly) x 10 months(2 months off a year)=70,000-80,000L per year.

DI only.

Cheers Dazmond, that's the kind of answer I was after

[Shrek]

Shrek if  I can remember you said the TDS after your RO was around 7ppm, so the answer is you're well above norm
even for a heavy user of water.
At your TDS you're  talking about one or two 11litre vessel fills a year depending on usage and how OCD you are on keeping the
water at zero.

Cheers Sean , I was hoping you'd reply as you seem to know your stuff when it comes to RO's etc

[mufcglen]

6-7 bags a year based on double 11 ltr di method with tap tds of 76ish and roughly use about 4-500 litres a day.
i use the mb115 resin too!

[Klean07]

I change my 11 litre vessel about every 4 months though I do have a water softener built into my system which makes it longer lasting!

[Shrek]

6-7 bags a year based on double 11 ltr di method with tap tds of 76ish and roughly use about 4-500 litres a day.
i use the mb115 resin too!

Is that between £5-600 a year? seems a lot for low TDS 

[Shrek]

I change my 11 litre vessel about every 4 months though I do have a water softener built into my system which makes it longer lasting!

Water softener, that's interesting.... does it lower your TDS before it get to RO? or how does it work?

[Klean07]

I have an 11 litre water softener vessel which stands next to my resin one. I change the salt every month. Salt costs pennies! So on fill it goes through softener before resin which brings the tds down even further!

[mufcglen]

6-7 bags a year based on double 11 ltr di method with tap tds of 76ish and roughly
use about 4-500 litres a day.
i use the mb115 resin too

Is that between £5-600 a year? seems a lot for low TDS 

I pay £70 a bag which lasts me 2 months-ish and when you think about the money we make from it, can't complain really!!
I can't ro as I don't want a big tank in my front garden then having to get a pump to transfer to van etc I'd rather just fill the van from the tap then di as I go, when I've looked at ro I don't think I'd save a great deal every year having to buy all the stuff then changing a 4040 ro membrane etc
So double di works fine for me but I'd be interested if these water softener above works to  save more resin?

[SeanK]

6-7 bags a year based on double 11 ltr di method with tap tds of 76ish and roughly
use about 4-500 litres a day.
i use the mb115 resin too

Is that between £5-600 a year? seems a lot for low TDS 

I pay £70 a bag which lasts me 2 months-ish and when you think about the money we make from it, can't complain really!!
I can't ro as I don't want a big tank in my front garden then having to get a pump to transfer to van etc I'd rather just fill the van from the tap then di as I go, when I've looked at ro I don't think I'd save a great deal every year having to buy all the stuff then changing a 4040 ro membrane etc
So double di works fine for me but I'd be interested if these water softener above works to  save more resin?

You could set up an RO in your Van as they don't take up much room, not joking as long as you're not metered with a
TDS of 76ppm you should be making pure for pennies.