Shop Vac Dust Collector Cyclone Pre Filter with 55 gallon drum.

After seeing other videos on how to make a shop vac pre-filter with 5 gallon pails, I decided to make one using a 55 gallon drum with a removable lid. Works great! The vacuum hose is 2.5". The plastic fittings and tubing are 2" Schedule 40 PVC, with 2" Fernco rubber fittings.