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Amazin

  • Posts: 221
How much DI resin do I need for this?
« on: June 04, 2023, 12:53:09 pm »
The PPM reading after the RO unit (brand new) is around 30. After DI unit it's 10PPM.

I'm thinking it's time to change DI resins. But how much do I need for that? (Please see photo attached)
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Ascjim

  • Posts: 222
Re: How much DI resin do I need for this?
« Reply #1 on: June 04, 2023, 01:06:14 pm »
Yes time to xhange
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Don Kee

  • Posts: 4900
Re: How much DI resin do I need for this?
« Reply #2 on: June 04, 2023, 01:28:14 pm »
πr2 x the height.

Allowing for the fact it’s coned at the top,  6.5litres give or take.
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SB Cleaning

  • Posts: 4334
Re: How much DI resin do I need for this?
« Reply #3 on: June 04, 2023, 07:40:34 pm »
A reading of 30 on a brand new RO is very poor, it should be a lot lower than that.
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Splash & dash

  • Posts: 4364
Re: How much DI resin do I need for this?
« Reply #4 on: June 04, 2023, 07:45:24 pm »
Quote from: SB Cleaning on June 04, 2023, 07:40:34 pm
A reading of 30 on a brand new RO is very poor, it should be a lot lower than that.


It depends what the tap TDS is also takes a while before a new ro works as efficiently as it should
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Spruce

  • Posts: 8590
Re: How much DI resin do I need for this?
« Reply #5 on: June 05, 2023, 07:06:42 pm »
It's an 11 litre vessel. The instructions say to fill to the line. So it will be less than 11 litres is my guess. :D :
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Success is 1% inspiration, 98% perspiration and 2% attention to detail!

The older I get, the better I was ;)
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