Product review (5 stars): works like it should
When my new whirlpool dishwasher was installed, replacing a 'builder quality unit', the installer never replaced the in place drain hose.  It was a rubber hose that eventually collapsed due to age and heat.  You always want to install the new hose that comes with the dishwasher... since it is a ringed plastic rigid tube.  It won't collapse and cause you drainage problems.

This hose is the OEM hose that likely came with my new dishwasher... but the installer likely threw away or took with him.  Installing was a snap with existing snap rings...  works like it should.