Saturday, June 28, 2014

DI tank 20x2.5 vs 20x4.5

I need to add a new DI tank to one of my vehicles and it needs to be smaller than a 1/2 cubic foot for space reasons. This will be used after an RO membrane. I know some will recommend I just buy something ready to go but first I want to compare two sizes of DIY tanks...a 20x2.5 inch and a 20x4.5 inch (big blue), both with refillable cartridge inserts. I know the obvious advantages and disadvantages (mainly initial cost, size, weight, and frequency of changing resin differ between the two). I have two specific questions...



1. Is there going to be a flow rate difference?

2. Does anyone know the exact amount of resin that fits in each respective tank? I've seen a range of 24 to 32 oz for the smaller tank and 6.5 to 7 lbs for the larger, but would like verification.





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