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george renwick

  • Posts: 35
double di
« on: September 15, 2018, 04:10:53 pm »
Hi i am using double di and theres something not right with it which i canny put my finger on it .
Going through two di,s it comes out at 2ppm ! 
Now if i test the first di by itself it reads 2 ppm so its pulling from 80ish to 2 ppm!
Then if i test the second one by itself it also reads 2 ppm 
Th back one used to get up to about 40ppm before i needed to change the front one . Im confused any help , ideas 
Have given them a good shake , only making about 1200 litres a month , Surley it should last longer than this ! Only about 2 months since i changed the back one .
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The Jester of Wibbly

  • Posts: 2091
Re: double di
« Reply #1 on: September 15, 2018, 04:34:02 pm »
Sounds like it's a tds calibration issue.  Try another reader and it my be 000 anyway.
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george renwick

  • Posts: 35
Re: double di
« Reply #2 on: September 15, 2018, 04:38:09 pm »
Have two tds meters they are both reading the same 2
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֍Winp®oClean֍

  • Posts: 1610
Re: double di
« Reply #3 on: September 15, 2018, 05:44:54 pm »
Start with the obvious... is the flow direction of the newest vessel correct?

Is the riser tube inserted and sealed correctly inside the head?

Are all/any internal strainers clear and not blocked?
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