Slow to drain - Washing Machines

What you should do is get a flashlight, remove the hose from the pump and look into the suction port on the pump. Check for anything clogging the pump. Check the blades on the pump impeller. Make sure that no blades are broken or missing and that the impeller rotates freely. If any blades are missing or broken or if you cannot get the impeller to turn freely, then the pump will need to be replaced. Hope this helped and best wishes.