I just installed a 3/4 hp insinkerator evoloution disposal and I tested for leaks and found none. However when I filled up the sink and then let it drain into the disposal it leaks from the disposal outlet where the rubber seal is. I've tried several times to figure out why it only leaks when the sink is full of water but no results. Please help!

It leaked at the connection to the sink, correct? When you installed the disposal to the drain you might not have got a good seal. Take the disposal back off and reinstall. Good luck, Tom

Hi Bcolby

Did you install plumber's putty around the underside of the upper disposal flange? If not, that is your issue... ;)

Otherwise, reinstall as Tom suggested!

Mark