Shop All Sump Effluent Sump Pumps. Find Sump Effluent pumps vortex impellers pass spherical solids 0.25 - 0.75 inches. Find best rated Effluent Pump. Even though the effluent pump can pass solids; the diameter of the solid is only up to 3/4 (0.75) inches compared to sewage pumps which pass 2 inch diameter solids.Liberty Pumps Sump/Effluent Pumps Zoeller Sump/Effluent Pumps
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