![]() ![]() You can reprime and hope it does not happen again or at least not too often. Too much air will cause your pump to lose prime. I don’t know who measured it and I don’t know whether they measured it underwater (small bubbles under pressure) or at the pump inlet (big bubbles in a vacuum). Pump authorities state that a pump will lose prime if the flow to the pump includes 2 percent air. Removal of the solids frees the gas and it either rises to the surface or enters the suction inlet to cause mischief. Organic material, buried in the deposit has decomposed creating gas that remains trapped under water. Usually, gas is the culprit when a lot of bubbles or foam accumulate on the surface of the water above the suction inlet. Some questions the cause was usually found to be one of the following: Over the years I have heard stories about dredges “that just quit pumping”.
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