Question about check valves - The Planted Tank Forum
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post #1 of 5 (permalink) Old 11-20-2012, 04:57 PM Thread Starter
Algae Grower
Join Date: Nov 2012
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Question about check valves

I am doing the DIY CO2 method for my fish tank. This forum has been awesome, but I just have one question. I bought a check valve, one side says in the other says out. Am I correct that the "in" side should be closest to the Yeast bottle?
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post #2 of 5 (permalink) Old 11-20-2012, 05:38 PM
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Sounds about right....

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post #3 of 5 (permalink) Old 11-20-2012, 06:08 PM
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Mine has little arrows on it indicating the flow. Point the arrows away from your yeast and into your tank.

If your's just says "in" and "out" then yes, i'd say the "in" side is the yeast side and the "out" side goes to your tank.
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post #4 of 5 (permalink) Old 11-20-2012, 06:16 PM
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try it which ever way...if there is no bubble.... switch that baby around and ur set

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post #5 of 5 (permalink) Old 11-20-2012, 10:51 PM
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just blow into it...
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check valve

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