Product review (5 stars): Works and easy to install
Our fairly new Amana bottom freezer refrigerator started to leak water on the floor. I recognized this as the defrost mode going bad. I did a web search and found out that this is a well known problem and that there was a east fix. There is a rubber one way valve called a "duck bill", it is located in the back behind the lower tin. I few 1/4" sheet metal screws and you can see it, it is on the top of the compartment to the left of the motor. It plugs up with crud and does not allow the water to drain from defrosting. This backs up and freezes and then runs out on the next defrost cycle. This replacement 90 trap will eliminate the duck bill.
 Here is a link to a good write up on how to defrost/de-ice the freezer first; http://forum.appliancepartspros.com/refrigerator-freezer-repair/319093-amana-bottom-freezer-ice-build-up-leaking-3.html#ixzz3YTFqMJU3

One hint, the top shelf has two flat boxes in the back on each side that house the gears for the shelf. If you use a thin screwdriver to pop the two tabs that hold it is place, you can lift it up a bit and then the shelf rolls right out. Use the same screw driver to pop the tab on the bottom of the old drain chute.
 Jeff