More RO/DI help

[WVNed]

I have a BRS 4 stage unit and when I run it the DI chamber is half full of air which never purges.
It works fine and I added the 2nd membrane watersaver upgrade. My water pressure is good and I run it at 75 PSI and it makes 6 gallons an hour like it should.
Is there something I need to do to purge the air?

 

[Crabs McJones]

There's nothing you need to do, the air will eventually work its way out. If you must you can purge the air, but it's not hurting anything.