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Old 09-26-2021, 11:47 AM   #4
Dennis4809
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Join Date: Apr 2013
Location: Graham
Posts: 225
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I think the majority of people have the opposite problem, ie, the gray filling much faster than the black. Having the bath sink on the black tank allows for some flexibility. If gray fills to fast, use the bath sink more. If black capacity is the problem, use the kitchen sink more.
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