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Old 12-29-2009, 08:39 PM   #11
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I know that having the holes above the waterline is a good way to stop back flow. But I had to manually put someting in the hole to allow air in. Otherwise, the sump would have over flowed. Should I drill bigger holes?

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Old 12-29-2009, 08:49 PM   #12
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If the holes are above water wouldn't it splash water out of it when the pump is running? You would also get alot of air in your system from it sucking air through those holes. I'm confused. How did you get the system primed in the first place to start off?

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flow, val

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