[APD] Re: CO2 and Check Valves

["Tom Wood" <tomwood2 at flash_net>]

I use a Tetra plastic airline check valve, the kind with the rubber flat 
nipple looking thingy inside. It's been in service for a few years with no 
sign of degradation. It is between the pump intake and a bubble counter, 
which also includes a check valve. But I needed the Tetra because capillary 
action would cause a siphon whenever I opened the bubble counter to add 
fluid.

The ultra-cheap plastic check valves always cracked open, so I guess it's a 
matter of finding a valve that uses components that aren't affected by 
carbonic acid?

TW 


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