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Old 07-08-2009, 10:48 AM   #2 (permalink)
rbursek
Elegance coral
 
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Join Date: Mar 2008
Location: Germantown, Milw, WI area suburb
Posts: 1,183

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Re: Do check valves restrict flow?

Yes they do plus snails, algae ect can couse them not to seal when needed, so are not considered reliable when needed.
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