The water is cleanish. When I stopped the D/W after it had pumped out the water at the bottom (which was largely clear, allowing for contamination with a few food scraps) the sump was clear of water. I left it for a while (maybe about ½ an hour) and the sump was refilling with what looked like clean water. This suggests to me that the inlet valve is leaking. The new water was quickly cleared by restarting the machine, but the pump operated continuously and the wash cycle would not start. I turned off the machine and also the water supply. The sump remains empty.