the drain collar is proprietary and non standard so you cant use alternate collars. Only the collar that ships with the unit The rubber catch/guard does stop sound, but it also restricts water too much so you will get the sing to fill up a bit (until the wait pushes the 'leaves' open sufficient for flow. It is possible to use scissors to make the central hole a little larger sufficient for flow.
I was not given a registration card for the garbage disposal. I thought oh I will just crawl down there and look for the serial number to enter on the site and be done with it. It took me 15 minutes of moving in so many directions to get a DECENT photo of the Serial Number because of the IDIOTIC positioning of the sticker separate from the (FRONT FACING EASY) Model number and its a HUGE imposition to a person with a physical disability to try to get to it to register it. PUT THE STICKER ON THE FRONT OF THE PRODUCT not the rear that is facing the WALL!!!!!!!!!!!!!!
This is my first time to install a disposal and removing the old one was the hardest part! Once installed I was amazed at how quiet it was, fabulous compared to the old one.