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Old 08-22-2015, 10:05 AM   #1
Elliott225
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Default Filter problem

I got a problem and cannot find the cause. Maybe someone can think what is causing this.

I'm using a Fluval 406. I am getting air into the canister and it is causing (1)loss of flow, (2) impeller rattle, and (3) air in the out-flow when I get it flowing again.

I have no water leaking from the canister. I have checked all hoses to see if any are sucking in air. I did have the hoses long but I shortened them so is straight from the tank to the in-flow and the out-flow. Everything is perfect except for the air pockets.

It's making me crazy.
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Old 08-22-2015, 11:45 AM   #2
Mugwump
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..try turning it upside down and gently shaking it....you may just have gotten air pockets in the trays when cleaning and replacing...??
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Old 08-22-2015, 12:35 PM   #3
Elliott225
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Shaking it helps but didn't stop it. I'll turn it upside down and see.
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Old 08-22-2015, 06:53 PM   #4
emc7
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You can try putting a silicone grease on the seals or replacing the seals (generally a good idea every few years). Look up your specific filter and make sure you have all the parts and they are in the right place. A small hole or gap anywhere can cause air to suck in without leaking water out.
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Old 08-22-2015, 09:28 PM   #5
Elliott225
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Ahhh the seal.
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Old 08-23-2015, 01:06 AM   #6
emc7
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Check the O-ring, its easy to get out of place. Consider this: http://www.amazon.com/Hagen-Fluval-M...r+filter+parts
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Old 08-23-2015, 11:07 AM   #7
Mugwump
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Originally Posted by emc7 View Post
Check the O-ring, its easy to get out of place. Consider this: http://www.amazon.com/Hagen-Fluval-M...r+filter+parts

Good idea....if they're not seated properly they pull air through the system...
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