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Old 09-22-2011, 11:29 AM   #1
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I need a check valve (I did a search)

So last night I bought a nano co2 diffuser off ebay. Today I am shopping around for a check valve. I know what to look for, but don't know where to get one. I tried ebay, and anything I can find is overseas. I don't feel like waiting 3 weeks to get a $5 item. Are there any sites within the US that you folks know of where I could find one?

I'm looking for something like this.

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Old 09-22-2011, 11:32 AM   #2
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They're pretty widely available, or should be. I got mine at PetSmart.
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Old 09-22-2011, 11:36 AM   #3
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They're pretty widely available, or should be. I got mine at PetSmart.

This one?

Top FinŽ Aquarium Check Valve - Air Pumps & Accessories - Fish - PetSmart
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Old 09-22-2011, 11:40 AM   #4
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Yep, that's it.
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Old 09-22-2011, 11:42 AM   #5
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Maybe double-check. I'm using mine with an air pump. I'm guessing the check valves are all the same, but maybe double-check just in case the one used for Co2 diffusers are different somehow (which I have no experience with).
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Old 09-22-2011, 04:55 PM   #6
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I can't imagine that they are. Anyone else care to chime in?
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Old 09-23-2011, 12:57 PM   #7
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I found this online.

Setting up a CO2 system

It says you can use a regular check valve but you should change it annually as the co2 will damage it. Same for the standard silicone tubing.
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Old 09-27-2011, 12:24 AM   #8
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Yep, that's it.
So I picked up one of those filters today. When I blow through it, there is a little resistance. Is this normal?
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Old 09-27-2011, 12:30 AM   #9
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Just be advised, if you use a plastic check valve with CO2, you will need to replace it every 3-6 months for it to remain effective. CO2 unlike air from an airpump is corrosive, and it will eventually degrade a plastic check valve to the point where it no longer prevents backflow.


EDIT: Never mind... Read thru this too quickly, retired_AF already had it covered . And yes, a little resistance is normal.
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Old 09-27-2011, 12:45 AM   #10
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Just be advised, if you use a plastic check valve with CO2, you will need to replace it every 3-6 months for it to remain effective. CO2 unlike air from an airpump is corrosive, and it will eventually degrade a plastic check valve to the point where it no longer prevents backflow.


EDIT: Never mind... Read thru this too quickly, retired_AF already had it covered . And yes, a little resistance is normal.
Yeah, they're cheap enough. I picked up a back up valve. I can't wait for my diffuser to get in tomorrow.
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