Product review (5 stars): INEXPENSIVE FIX FOR POORLY DESIGNED ORIGINAL DRAIN
Wish I knew about this before disassembling my bottom freezer twice in three years to melt the ice sheet and clear the condensate drain with a wire. This replaces a poorly designed duck-billed rubber drain valve that plugged up on my Maytag (Whirlpool) refrigerator.  It's an easy 10 to 15 minute fix once you have the lower back panel off.  I discovered that the duck bill had been knocked off the last time I had the freezer apart.  No more waking up to water running from under the refrigerator.