Rick,

You can get plastic (poly) 55 gal. drums for about $10. Find a company that uses chemicals. Most chemicals come in these barrels. At my company we use chemicals in the boilers and these drums are available free. That doesn't help you but you might look at your local industries for a supply of barrels.

I use 2 in my WVO process. I filter raw grease to 25 micron bag filter and then pump that mixture onto the other barrel through a 10 mic. bag filter. From the last barrel I decant the oil into 5 gal. 'cubes' and let it stand. The oil will seperate. I then syphon off the clean oil from the top and leave the sludge. The next time I collect grease I return the sludge. I have had no problems with clogged filters using this method.