DD31-00005A Samsung Dishwasher Drain Pump. This is the DRAIN pump. Fits Samsung dishwasher models: DMR57LFB, DMR57LFS, DMR57LFW, DMR77LHB, DMR77LHS, DMR77LHW, DMR78AHB, DMR78AHS, DMR78AHW, DMT300RFB, DMT300RFS, DMT300RFW, DMT400RHB, DMT400RHS, DMT400RHW, DMT800RHB, DMT800RHS, DMT800RHW