Air in DI Chamber.

miyags · Mar 24, 2014

I have a coralife DI unit with a BRS refillable cartridge for DI resin. The DI unit doesn't stay filled with water,I keep getting air in the unit. 1/4 to 1/2 the chamber is filled with air. Is there a way to stop the air getting in the unit? I tried to tighten all the chambers in RO unit,but still get air.

Browncoat · Mar 24, 2014

If its just the di stage that's normal.

Waters · Mar 24, 2014

I normally just unscrew the DI canister while the unit is running which allows the air to escape. Once the water level rises to the top, I screw it back in.

miyags · Mar 24, 2014

Its just a pain to unscrew it to let the air out,water drips all over. good thing its in an unfinished basement. just thought there might be a trick to stop the air.

kschweer · Mar 24, 2014

The air isn't an issue it's normal. No need to worry about it, it will not effect anything at all

Waters · Mar 25, 2014

kschweer said:
The air isn't an issue it's normal. No need to worry about it, it will not effect anything at all

I don't know about miyags, but when I first turn the unit on, the water level drops in the DI canister until it is only 1/2 filled with water. If I don't release the air, there is very little DI material even coming in contact with the water??

kschweer · Mar 25, 2014

I'm sure az will chime in when he sees this and he will have a more detailed explanation than me. But the way the canisters work is water comes in on the outside of the DI cartridge and flows up through the middle of it. Essentially the water is being pushed up through the resin. It makes contact with the resin flowing through the middle so the air on the outside is nothing to worry about

kschweer · Mar 25, 2014

https://www.reef2reef.com/forums/showthread.php?t=152149

AZDesertRat · Mar 25, 2014

No big deal. The DI gravity so raise the outlet the level goes up, lower the outlet to the floor it goes down. You can unscrew the canisterand bleed the air but it will come back. I don't worry about it.

jservedio · Mar 25, 2014

Waters said:
I don't know about miyags, but when I first turn the unit on, the water level drops in the DI canister until it is only 1/2 filled with water. If I don't release the air, there is very little DI material even coming in contact with the water??

Even partially filled, 100% of the media is reacting with the water: there is a media catridge inside the DI housing. Water flows up through the media cartridge to leave the DI stage. Water flows from the top of the housing down to the bottom and then back up through the media. Even if the housing is only filled 1/4 of the way up, the entirety of the media is coming in contact with the water.

Waters · Mar 25, 2014

jservedio said:
Even partially filled, 100% of the media is reacting with the water: there is a media catridge inside the DI housing. Water flows up through the media cartridge to leave the DI stage. Water flows from the top of the housing down to the bottom and then back up through the media. Even if the housing is only filled 1/4 of the way up, the entirety of the media is coming in contact with the water.

Ahh....ok, that makes sense. Thanks for the info.

AZDesertRat · Mar 25, 2014

Watch the flow in the canister when you turn it on. You will see a stream of water travel down around the outside of the DI cartridge from top to bottom then disappear. It is sucked up through the inside of the cartridge where the DI is tightly packed then exits out the top where you do not see it. Again, normal and no big deal. If you want to test things a little raise and lower the treated water outlet line and watch the level in the canister rise and fall.