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Old 06-14-2009, 11:05 PM   #1
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Pump to overflow ratio?

Hello again, I just bought a pump today and installed it in my wet/dry filter. But the pump drains my W/D Filter faster than my overflow can fill it. I don't kow the GPH of the overflow(hang-on type with 1" U-tube and 1" stand pipe) but the pump is 850gph at 4 ft. How can I adjust the flow out to match the flow in? TIA
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Old 06-14-2009, 11:29 PM   #2
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Your overflow should have a least a 1" line (or larger) to the sump as straight a possible. Your return line should have a siphon break just above the water line when the pump is off (to keep your sump from flooding). You could install a ball valve on the pump output to restrict flow or a "T" and a valve to a return back into the sump. Do you know the flow rate of the overflow box?
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Old 06-14-2009, 11:40 PM   #3
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Do you know the flow rate of the overflow box?
Im not sure, bought it used from LFS
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Old 06-15-2009, 12:28 AM   #4
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Valve fixes all!
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Old 06-15-2009, 08:01 AM   #5
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1" drains at 600gph.

Use the ball/gate value advice above or get a different pump. A mag 9.5 would pretty much handle it right out of the box.
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Old 06-15-2009, 12:27 PM   #6
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Right now I'm using a pondmaster 9.5, but I got the ball valve and will be installing it today.
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Old 06-15-2009, 12:35 PM   #7
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be careful of the pondmaster, they are not magnetic drives. Even though they are sealed they contain oil. Thats' what accounts for the difference in the price between the models. On Ebay (and other places) you'll see a lot of people pricing/selling them at the same price as the aquarium model.
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Old 06-15-2009, 03:36 PM   #8
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be careful of the pondmaster, they are not magnetic drives. Even though they are sealed they contain oil
Are you sure cause it says powerful magnetic drive. No seals to wear and no oil, and it also has a magnetic impeller when i take it apart. Maybe they changed their production.
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Old 06-15-2009, 03:37 PM   #9
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Oh yeah, it definetly wasn't cheap.
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Old 06-15-2009, 03:39 PM   #10
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Not saying cheap but the PM 9.5 is probably in the 60-80 range online where the mag (I forget the letter designation) is closer to 100-120-ish. Note the '-ish'.

My only point was that there is some exposure there w/ the PM version.
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