RO/DI question

[JeremyS]

I recently ordered a RO/DI filter from you all and it's been great, but I was curious about something. The DI "canister" (not sure if that is what you'd call it) never fills with water. Production is fine and TDS is 0, I was just curious if this is normal. Thanks!

[Air Water and Ice]

I recently ordered a RO/DI filter from you all and it's been great, but I was curious about something. The DI "canister" (not sure if that is what you'd call it) never fills with water. Production is fine and TDS is 0, I was just curious if this is normal. Thanks!

 

Yes that is typically how the DI filter works. When you stop making RODI water and close off the RODI output, that will create back pressure into the unit causing the ASOV (automatic shutoff valve) to kick in and water will stop coimng into the unit. During this ASOV process, the DI filter will fill up and then will again drop down to being part full when you start making the RODI water again.