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Old 12-28-2004, 05:27 PM   #1
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Overflow Boxes, yo.

CPR Continuous flow Overflow box
Standard U-Overflow Box

What's the dif?


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Old 12-28-2004, 05:32 PM   #2
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The CPR is quieter but can collect air in the elbow. A rio 800 RVT is need to constanly draw the air out . If to much air collects the siphon can break causing your tank to overfill.

Normal u-tube boxes can do this as well but it is more pronounced in the CPR models.
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flow, overflow, overflow boxes

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