Two filter towers on Ebay........ one purification the other the oil seperator
Purification does H2O, Co, Co2, Hydro Carbons, oil, taste and odor.....
http://cgi.ebay.com/ws/eBayISAPI.dll...ADME:B:LC:US:1

http://cgi.ebay.com/ws/eBayISAPI.dll...ADME:B:LC:US:1