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Poll

what do you do

tap to R/O to di to window
64.7%
22 (64.7%)
tap to di to window
35.3%
12 (35.3%)

Total Members Voted: 33

Pages: [1]

Pat Purcell

  • Posts: 568
DI systems
« on: November 14, 2007, 01:46:42 am »
How many on here run just a di system (di ing water straight from the tap) and what is your tds
Just looking for the person with the highest TDS from tap that runs a di only and how much resin you use to purify how much water
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windowwashers

Re: DI systems
« Reply #1 on: November 14, 2007, 08:24:52 am »
Quote from: Pat Purcell on November 14, 2007, 01:46:42 am
How many on here run just a di system (di ing water straight from the tap) and what is your tds
Just looking for the person with the highest TDS from tap that runs a di only and how much resin you use to purify how much water
Pat add a poll to this post, di or ro, I would be intersted to know how many aswell  ;)
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john tomkins

  • Posts: 1639
Re: DI systems
« Reply #2 on: November 14, 2007, 09:32:09 am »
Pat just use this....

The calculations are
20000 multiplied by litres of resin, divided by TDS into resin = Litres of pure

For me with 2 x 750mm containers of resin and 5 TDS into resin (from RO)
20000 x  1.5/5 = 6000 ltr of pure
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Dave hook

  • Posts: 94
Re: DI systems
« Reply #3 on: November 14, 2007, 10:31:22 am »
If your just running water through a di use 2 di vessels instead of 1 this way resin lasts longer and the tds will read 0ppm. On rare occasions i do this if ive no water in tank and a custy wants a con roof doing or summat. You can pick up a new di vessel for about £30 on ebay
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Money makes my world go round!

DASERVICES

Re: DI systems
« Reply #4 on: November 14, 2007, 05:33:12 pm »
DI only , TDS 34
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windowwashers

Re: DI systems
« Reply #5 on: November 14, 2007, 05:52:15 pm »
RO and di TDS 472  >:(
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D.Salkeld_Ltd

  • Posts: 951
Re: DI systems
« Reply #6 on: November 14, 2007, 09:52:12 pm »
RO and di TDS 280 - 300.

Mind you, since Louth flooded the TDS dropped to about 180 ;)

David
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Not Perfect - But Honest

macmac

Re: DI systems
« Reply #7 on: November 15, 2007, 12:00:07 am »
2 x DI only  tap tds = 096ppm

tony
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gary999

  • Posts: 8156
Re: DI systems
« Reply #8 on: November 15, 2007, 08:27:31 am »
di only tds 48ppm :)
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Sanity

  • Posts: 426
Re: DI systems
« Reply #9 on: November 15, 2007, 12:15:27 pm »
RO + DI.  Tap TDS = 360
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Captain Scarlet

  • Posts: 3087
Re: DI systems
« Reply #10 on: November 15, 2007, 01:07:51 pm »
di only with a ppm/tds of 34
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easy

  • Posts: 258
Re: DI systems
« Reply #11 on: November 15, 2007, 06:05:58 pm »
RO + DI.  Tap TDS = 447 .........here in Essex
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zeusjazmin

  • Posts: 244
Re: DI systems
« Reply #12 on: November 15, 2007, 09:25:09 pm »
di only reading is 24
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dai

  • Posts: 3503
Re: DI systems
« Reply #13 on: November 15, 2007, 09:41:09 pm »
DI only, two vessles in tandem, costs £1 a day with 57 TDS
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Pat Purcell

  • Posts: 568
Re: DI systems
« Reply #14 on: November 15, 2007, 09:43:12 pm »
Thanks for the responses, It looks like TDS of about 100 is where people start to find an R/O more practical
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ian m

  • Posts: 136
Re: DI systems
« Reply #15 on: November 16, 2007, 05:46:16 pm »
Hi Pat

I do 2 days work a month where I use water that is tds 160

I use about 4--5 litres of resin over  these days

Hope this helps


Ian
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Jon-scwindows

  • Posts: 645
Re: DI systems
« Reply #16 on: November 16, 2007, 09:53:40 pm »
i have only been using my 300gpd Ro unit, the tap tds is 250 ish or less- but when filtered- comes out at 16 or 17 ppm and this has been fine- the windows still dry spotless, i will start using DI resin soon though to bring it right down to 000 just to be sure.
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