Help. Any suggestions? Faulty air check valve or user error

[KorL]

Have a precision marine Kalk reactor and I noticed that it keeps back siphoning into the ato reservoir. There's an air line check valve in between the reactor and ato pump. Prior to the precision marine reactor I was using a tunze Kalk reactor and can't remember having this issue. The precision marine is a lot taller reactor compared to the tunze. And is also taller than the ato reservoir. I even put in a new check valve thinking the old one wasnt good anymore. Still back siphoning.

Any suggestions on a reliable check valve. Do they go bad frequently? Or do I need to place thevery check in a specific spot?

 

[moseley75]

It only takes a small piece of trash in the check valve to cause it to fail. When you replaced the check valve did you flush the lines to make sure they were clean?

 

[KorL]

Didn't flush lines. But it's only ro water and Kalk solution. I even put in anew air line check valve.

 

[KorL]

Is there high grade more reliable check valve available? I just use the $2 ones at the pet store

 

[moseley75]

I don't know about high grade. I have always used the cheap ones too.