I do get some air in the canister when I do a change but it works it self out. Not sure how your sump is laid out but if you can move the inlet pump as far away from your drain line that would at least eliminate air entering through the pump.

If I unscrew the canister a little the air disappears but sure enough it will come back pretty quick. I just live with it but maybe I'll email BRS and see if there is a reason why it happens.

Sent from my Nexus 4 using Tapatalk

On mine (9 months old) there's a little red button on top that releases air.

Do you use that button only after a media change, or do you have to purge air between changes ?

Usually I have to use the red button after a media change and about a quarter of the time I have to use it again during regular use as some air builds up.

Looks like I may have found/solved the issue

I ran the second reactor through a bucket of RO for a couple days
At first it had issues, but upon re-seating the canister it behaved properly

Tonight I took them both apart to compare stuff and there it is ...

The sealing gasket on top of the trouble cartridge was up and sideways a bit
I've put it back where it belongs and it's been good for a few hours now

I'll report back tomorrow with the final results

Fingers crossed ....

If it looks good I'll write a review as I'm pleased with everything else about them

I don't want anyone to be mislead by my previous post as my diagnosis was incorrect. It has nothing to do with the cartridge sealing gasket

What 1eyedjyde said makes perfect sense
but I ignored it as my pumps are in my last chamber and I've never had air going through either my return or my chiller

After days of still getting air in the reactors I think I've found the issue.
My pumps were quite close to the last baffle and it looks like they've been picking up micro bubbles. It was never an issue with the TLF150s as any air introduced can burp out on it's own, but the 'RO' style canisters trap any introduced air which then builds, and builds and ...
I had to use a flashlight with my sump room lights off to spot the bubbles

I've moved the pumps as far as possible away from the baffle and hope to report back that the issue is solved. I'll give it a couple days before I do so

I'm loving this reactor style for ease of use, and in my case the spread through the media is far superior to that of the TLF150s

Another update ...

Looks like microbubbles in my sump have no bearing on this setup, but there may be a fix, and it may apply to all you BRS media reactor owners ... :smile:

It was mentioned earlier on in this thread about putting the flow valve on the 'outlet' side of the canister
It may turn out that Harry, and some other peeps Jeff and I spoke with in-store, were spot on ...
Something about keeping pressure in the whole system, tubing and fittings included, seems to solve the problem. But stay tuned to see if I've been successful over the next few days ....

I've installed the flow valve 'after' the canister and have over 3 hours of runtime now with no water level drop in my GFO canister :lol:
In the meantime, my Carbon canister has dropped approx 1/2-3/4"

If you go with this 'after the canister valve setup' you should be aware that the water coming out is quite a bit more violent than having the valve before the canister

Good luck to all of us :biggrin: