I always drained washing machines with a shop vac, thought that was the only way. Last month a clogged drain line at a rental in Austin left me standing in soapy water, so I grabbed a cheap hand siphon pump from the hardware store. That thing pulled 10 gallons in like 2 minutes and I didn't have to haul the vac up three flights of stairs. Now I keep it in my truck for every washer job, way less cleanup. Has anyone else tried one for dishwashers too, or is that asking for trouble?