On the Audex “AW” range of submersible pumps, an agitator is attached to the shaft to minimise the risk of sand clogging up the pump. To achieve the same output, pumps made for ‘dirty-water’ require a larger motor, plus a gap between the volute chamber and impeller to allow for pebbles, sand, silt, and the like. An important consideration in pumping run-off flood water is that its likely to be contaminated with solids possibly of unknown size and concentration. A good dewatering pump has a reliable, powerful motor with a larger diameter discharge hose to provide a good flow-rate, plus a quick and efficient on/off control. The main aim of submersibles for flood or dewatering purposes is to move a high volume of water a sufficient distance so it discharges safely off-site. First of all, to work out the submersible pump size you’ll want for the job, let’s start with considerations for some of the most common applications for submersible pumps: Dewatering & Flood Control
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