davey Stainless steel shell, double cased submersible dewatering sump pump . davey sump pump use for dirty water pumping , Sump emptying , Septic effluent water disposal ,Pumping of waste water with small soft solids in suspension . davey  sump pump pumping in partially submerged applications  . davey  Open impeller, semi-vortex, centrifugal design . davey pump Less susceptible to blockage . davey pump provide long service life . davey pump protected against overloading . davey pump easy to connect to power supply . Longer life in dirty water . davey pump attractive, lasting appearance