On some machines the outlet of the drain hose must be above the top of
the tub or the water can possibly be siphoned out of the tub during the
wash cycle. Mine drains into a 2" pvc pipe which runs under the house to
the front yard where it is hooked to black poly pipe. Besides not
wanting to waste the water, I am on a septic tank. The yard seems to
like it just fine, though I will admit I seldom use bleach.