Air in the CPR chamber

[Jackson919]

Hello, (In regards to yesterday's thread)
I just installed the CPR overflow and a new external pump that pushes about 800 gph for my 55 gallon tank.

I want to attempt to bypass the little pump that sucks the air out of the chamber. What I did was attach the air line to a MaxiJet 600 powerhead which would create enough force to suck the air out when it turns on. It does not seem to have enough power because there are air pockets still in the chamber.

My question is, is the air trapped in the chamber a bad thing? From what I can tell it is the pump that pushes the water into the tank and the overflow just removes it at the same rate, so if the overflow can handle the water with air in the chamber the air in there should not be a problem.

Or am I missing something? Is the air in the chamber creating back pressure for the pump some how? Thanks for any help.

 

[Len]

The bad thing about air in that chamber is the increased potential for the siphon to fail. Air tends to build up over time, and most siphons fail at some point. Is there a reason why you don't want to use the little pump they supply? It is a simple solution to a common problem with hang-on oveflows.

 

[Jackson919]

No other reason than simplicity, I'm trying to keep all the overhead to a minimum.......but I probably will end up buying the pump....Thanks....