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Old 04-20-2013, 08:17 PM   #11
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Did you try turning off skimmer just for a process of elimination?
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Old 04-21-2013, 12:01 PM   #12
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We have finally found that it is indeed the return pump that is causing the air bubbles. So could it be the impeller or is it time to replace the pump?
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Old 04-21-2013, 12:35 PM   #13
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One cause of those bubbles is a restriction of your suction in return pump or the water level is low that it sucks air. If both are clear then yes you might need a new pump. The impeller blade might have been damaged by some foreign object.
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Old 04-21-2013, 12:43 PM   #14
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bulkhead fitting on the return side of the sump is 1.5". sump has 1.5" ball valve between sump and return pump. Pipe size out of the ball valve is reduced down to .75". Also has a 90 degree .75" elbow.
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Old 04-21-2013, 01:36 PM   #15
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So you have an external pump? You must have a loose connection on your piping between the return pump and the sump. Most likely at the ball valve. You might need a new ball valve and make sure it is tight enough by using a pvc cement. There is enough vibration on that pump that would loosen those connections. Post a pic of sump for easy analysis.
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Old 04-21-2013, 07:04 PM   #16
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Thank you so much for helping us. Sorry I didn't get back sooner but we went to Knoxville to the store. We are in the process of replumbing the pump area. It is a real mess! There is a problem there for sure.
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