Tds

[T1KARMANN]

I'm confused

I had 2 125gpd membraine running back to back which run 24-7 after 1 year of constant use the tds was 14ppm
I changed them as I think 1 year was a long time running all day
I swapped them for 150gpd units and the tds was 34 so I swapped them again for 100gpd units and it's now down to 22ppm still not as good as the old units

My psi is 65
My feed water is 342ppm

I don't use di as it gets killed fast even at 14ppm running 24-7

Is this normal for new membraine to have a higher tds for the first few days


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[Delapool]

I only know from mine sites that there is a settling period of maybe a week (this was 5 or 7 years ago), but unfortunately don't know any more.

 

[T1KARMANN]

Anyone else have any idea
It's been running no stop now for 24 hours and it's down to 20ppm

If it drops back down to what it was 14ppm I think I will be happy with that
So I probably didn't need to change the membrane but after one year of constant use it was probably a good idea


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