Vervo Posted October 22, 2010 Report Share Posted October 22, 2010 Hiya, our glass check valve didn't do much, and cause the water back flow... anyways, we need new check valve, but is it okay to use the regular check valve they sells in the shops here? Or do I have to get a proper check valve for CO2 setups and where? Quote Link to comment Share on other sites More sharing options...
waterlogged Posted October 22, 2010 Report Share Posted October 22, 2010 i just use an air one on my diy set up Quote Link to comment Share on other sites More sharing options...
oscnz Posted October 22, 2010 Report Share Posted October 22, 2010 Is your set up a DIY yeast system? Quote Link to comment Share on other sites More sharing options...
suphew Posted October 22, 2010 Report Share Posted October 22, 2010 You have to be a little careful because CO2 + water will give you carbonic acid, the little bit of moisture you get in your CO2 tubing can cause corrosion, particularly to anything metal. Quote Link to comment Share on other sites More sharing options...
dreams Posted October 22, 2010 Report Share Posted October 22, 2010 Been using a plastic one I got from HW for while now,did fine last time co2 canister backflowed, though that hasn't happened in a while either. I wonder if anyone knows how much co2 affects plastics/rubbers? Quote Link to comment Share on other sites More sharing options...
Vervo Posted October 23, 2010 Author Report Share Posted October 23, 2010 We use pressurised CO2 system, yeh we were worry about the acidic thing... we asked the hollywood fish farm albany last week, they said mt Roskill may have it for $40 (CO2 one) Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted October 23, 2010 Report Share Posted October 23, 2010 I am using a metal one from Ebay bought on my behalf for a lot less than that. Quote Link to comment Share on other sites More sharing options...
waterlogged Posted October 24, 2010 Report Share Posted October 24, 2010 my plastic one for my diy co2 just came apart lol Quote Link to comment Share on other sites More sharing options...
Vervo Posted October 24, 2010 Author Report Share Posted October 24, 2010 ok, we may get the metal one then, thanks Quote Link to comment Share on other sites More sharing options...
suphew Posted October 24, 2010 Report Share Posted October 24, 2010 I removed the metal one from my system cause it jammed up, i assume it corroded inside, but it's sealed so i can't open it to know for sure. Quote Link to comment Share on other sites More sharing options...
dreams Posted October 24, 2010 Report Share Posted October 24, 2010 Are the metal ones made with rubber internals as well? I cant imagine what else would work.. :bounce: Quote Link to comment Share on other sites More sharing options...
suphew Posted October 25, 2010 Report Share Posted October 25, 2010 I assume it's a spring and ball arrangement, either way I can barely blow through mine now let alone run low pressure c02 Quote Link to comment Share on other sites More sharing options...
Warren Posted December 14, 2010 Report Share Posted December 14, 2010 CO2 perishes some types of rubber very quickly (but seems ok with other type of rubber - trial and error). It breaks it down until it goes white and brittle and falls apart. The metal/ball/spring type are the best for CO2 but you have to be sure no moisture can get into it. The non-return valves used on airpumps don't last long - maybe a month... Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted December 14, 2010 Report Share Posted December 14, 2010 WB Warren Quote Link to comment Share on other sites More sharing options...
Luke* Posted January 15, 2011 Report Share Posted January 15, 2011 back from the dead Quote Link to comment Share on other sites More sharing options...
Adrienne Posted January 15, 2011 Report Share Posted January 15, 2011 I was told to put two check valves on when I remarked that one didn't stop the backflow. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted January 15, 2011 Report Share Posted January 15, 2011 I hope I have not missed the point, but: They are designed to stop the water from the aquarium flowing back towards the CO2 supply. They are not designed to prevent the fermenting mixture from a DIY CO2 plant entering the aquarium. Quote Link to comment Share on other sites More sharing options...
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