Changing the D/I media in my R-O system???

[Anonymous]

Does anyone know if I have to run product water into a waste bucket after changing my D/I resin? Or do you just turn it back on?

Also, I filled the cylinders to the top but did not pack it in. Did I do the right thing there, or should I have packed in as much as would go?

Thanks!

 

[Anonymous]

purging: It maybe a good idea to purge a gallon or two, since the initial rush of DI may contains some nasty organics that is part of the resin manufacture process. Better safe than sorry.

packing: It is usually better to pack well. But it is no big deal. The only issue you may get into is that if you push RO water thru it too quickly, it may liquified the resin beads that prevent a good perculation thru the media. So go slow with the flow rate, and don't shake it.

 

[Anonymous]

Thanks SE, I am doing the same procedure later this week and your input will be really helpful!

 

[Buckeye Field Supply]

purging: It maybe a good idea to purge a gallon or two, since the initial rush of DI may contains some nasty organics that is part of the resin manufacture process. Better safe than sorry.

packing: It is usually better to pack well. But it is no big deal. The only issue you may get into is that if you push RO water thru it too quickly, it may liquified the resin beads that prevent a good perculation thru the media. So go slow with the flow rate, and don't shake it.

Yes - discard the first several bed volumes after your install new resin.

You SHOULD pack the resin very tightly. If you don't, the resin bed will fluidize, and the anion and cation beads will separate. You'll no longer have a "mixed bed" and the effectiveness of the resin will be reduced. If the bed separates, you'll see what looks like a color change - starting at the top, rater than at the bottom of the cartridge in a bottom -up flow system.

Russ @ BFS

 

[Anonymous]

Actually, when I said "liquified" I meant fluidized. Anyway, conceptually, there is nothing bad about separated resin beads per se. The DI efficiency may go down slightly, but not a big deal. However, the issue is that when fluidization happens, the percolation is usually so bad that the contact time is very short, making the product water not as pure as it can otherwise.