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Pope vader

  • Posts: 1944
tds of hot and cold
« on: September 28, 2011, 04:34:36 pm »
does any one know whay the tds of my hot is higher than my cold, if i run them throught my di,  the flow of the hot is slower than the cold, as cold is mains pressure
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[GQC] Tim

  • Posts: 4536
Re: tds of hot and cold
« Reply #1 on: September 28, 2011, 09:33:32 pm »
Pretty certain DI resin isn't meant to be used with hot water.
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Nathanael Jones

  • Posts: 5596
Re: tds of hot and cold
« Reply #2 on: September 28, 2011, 10:47:34 pm »
Your TDS meter measures the conductivity of the water & hot water is more conductive than cold so gives a false high reading.
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Pope vader

  • Posts: 1944
Re: tds of hot and cold
« Reply #3 on: September 28, 2011, 10:51:53 pm »
so would it be fine to use
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Andy Prittchard

Re: tds of hot and cold
« Reply #4 on: September 28, 2011, 10:53:01 pm »
Yes, only if you add isopropanol.
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Nathanael Jones

  • Posts: 5596
Re: tds of hot and cold
« Reply #5 on: September 28, 2011, 10:55:15 pm »
Quote from: ORI on September 28, 2011, 10:51:53 pm
so would it be fine to use

Yep.
You can test it to be doubly sure by leaving a cup of it cool & testing again,.. the TDS will rise a couple of points from contamination in the cup & dust in the air etc, but when cold it should settle back to near 000.  ;)
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[GQC] Tim

  • Posts: 4536
Re: tds of hot and cold
« Reply #6 on: September 29, 2011, 12:06:39 am »
Interesting, didn't know that. :)
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dave f

Re: tds of hot and cold
« Reply #7 on: October 01, 2011, 07:32:36 am »
mmmm interesting ive just got a hot wash my  so just incase it gose up where do get the isopropanol how much do you add to 350ltr
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Mike #1

  • Posts: 4668
Re: tds of hot and cold
« Reply #8 on: October 01, 2011, 07:41:26 am »
all this hot wash talk surely you must have a notice on your van saying you are carrying a gas cylinder , and the van must be ventilated   some how
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dave f

Re: tds of hot and cold
« Reply #9 on: October 01, 2011, 07:57:00 am »
already got a sticker on van first thing i did as pointed out buy a pal who is a gas safe fitter ;)
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