Construction:

First use the circle cutter in the drill press to cut a snug hole for the disposal mounting flange. I recommend doing a dry fit before applying the silicon sealant, as we had to struggle to get the retaining clip on the flange, We actually had to use two large bar clamps to compress the inside of the flange hard enough due to the cooler bottom thickness. Once you are satisfied you can get everything seated, do it all again, but apply generous amounts of silicon sealant. Once the clip is set, wipe the excess from the inside and the outside of the cooler.

Next it’s time for the plumbing. The tailpipe coming out of the disposal does not fit the rest of the PVC, here is where you use the flexible coupling (not shown). We chose to route the return line back up through the bottom for better thermal insulation. Other designs return the blended mixture through a pipe external to the cooler and dump back in the top, but this will make your margaritas melt quicker. If you have the means to drill an exact size hole then through the bottom is best. Seal the hole and pipe with RTV silicon where it passes through the base.

Leave a bead on the inside of the cooler to help seal the hole. Run the pipe 2/3 of the way up into the cooler, then use one right angle elbow and one 45 degree elbow to jet the return stream gently in a spiral down the side. This helps create a vortex and minimizes foaming. The right angle nozzle after the valve has a reducing plug in it to reduce the flow to a more acceptable level.