My oil collection tank, a.k.a. the Super Sucker. 250 gallons of restaurant drum emptying suction! I'm particularly proud of the feet I welded up to keep it stable. I tested it by hauling home 180gal of vege oil in mid-August with no problems at all.

Left to right you will see;
The vacuum attachment with catch can.
The platform where I will mount my 24V vacuum pump and batteries when I get around to it.
3/4" fitting where the vacuum draws from.
1/2" fitting where I can purge the tank of air or vacuum quickly if needed.
Tank fill gauge.
Tank vacuum gauge.
A plugged 2" port that has no dip tube.
The 2" port that does have a dip tube. This port is where the vegetable oil goes into and out of the tank, so that's where the 2" suction-side reinforced bilge pump hose it attached. The hose has a standard basket strainer on the other end (not pictured) to keep me from sucking up big chunks, rags, and dead animals.