DIY co2 check valve - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 06-14-2011, 03:47 AM Thread Starter
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DIY co2 check valve

I do have a check valve but is it really needed if its all sealed up?
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post #2 of 4 (permalink) Old 06-14-2011, 04:01 AM
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With DIY in general, there's more of a probability for leaks. When there's pressure involved, that probably increases. Let's say you develop a tiny leak, and your cat/dog/little sister/gremlin knocks your soda bottle onto the ground. There's now increased back pressure from your tank. Quite possibly, tank water (eventually) mixes with your yeast solution, putting you back a couple days.

On the other hand, let's say your DIY skills are unearthly, and the system could survive the vacuum of space. But, again, your cat/dog/sister/gremlin knocks your bottle to the ground, and it lands on your sea urchin collection and blows. Your tank proceeds to empty onto the floor.

In either case, a $2 plastic check valve would have prevented problems. Your call
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post #3 of 4 (permalink) Old 06-14-2011, 04:45 AM Thread Starter
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Quote:
Originally Posted by kevmo911 View Post
With DIY in general, there's more of a probability for leaks. When there's pressure involved, that probably increases. Let's say you develop a tiny leak, and your cat/dog/little sister/gremlin knocks your soda bottle onto the ground. There's now increased back pressure from your tank. Quite possibly, tank water (eventually) mixes with your yeast solution, putting you back a couple days.

On the other hand, let's say your DIY skills are unearthly, and the system could survive the vacuum of space. But, again, your cat/dog/sister/gremlin knocks your bottle to the ground, and it lands on your sea urchin collection and blows. Your tank proceeds to empty onto the floor.

In either case, a $2 plastic check valve would have prevented problems. Your call
AHAHAHA! I will be using my check valve for sure. I don't think it could survive the bed of nails I sleep on.
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post #4 of 4 (permalink) Old 06-14-2011, 11:28 PM
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It depends on where your CO2 line terminates. If you have a sump system and you plumb your CO2 line into the pump inlet, which is near ground level, a check valve isn't really necessary provided your return line is incapable of acting as a siphon. Of course, even with this setup I recently added a check valve as a secondary fail-safe since I was re-plumbing the sump system. Of course if it ever needs to kick in then I'm dealing with a one in a million accident or a change in the laws of physics; but you never know.
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