Many leaks come from the pump itself. Fill hoses and fill valves also are bad for leaks. It is a good idea to do a visual check of all hoses, look for cracks, rub marks, leaky or rusty hose clamps. A fairly quick way to narrow down where to look for a leak, place a sheet of cardboard under the washer ( it should be almost as big as the washer ) and run a short cycle. When the washer is finished, look for the wet spot on the cardboard, this will help point you in what direction to look for where the leak is coming from...front...back...right side...left side. If you find the leak to be a bad pump, replace the pump. With the use of plastic drain hoses on many machines today, this has become a common leak trouble maker. The drain hose can rub the wall or a pipe and this will rub a hole in the drain hose.