For easier connectivity, we added tri clamps to our equipment. Units that come with two inch drains, like the iStill One, the iStill Masher, and the iStill Fermenter now come with tri clamps. And so does the iStill Pump! Underneath some pictures:
Install the new outlet drain with flange:
Connect the new inlet to the pump, using tri clamp: 
Connect the hoze:
Et voila!
And disconnected again ...
