text: i am looking to find a compressor to pump some heavy liquid to marinate some food, the material is very thick? the liquid will have eggs, vinager, oil, and spices here is one that will pump chicken parts. i am sure it can handle a thick fluid.  http://www.ferret.com.au/articles/9a/0c00f99a.asp  here are some smaller ones that might be of more use:  http://www.foodprocessing-technology.com/contractors/processing/watson_marlow/  http://www.processplantandmachinery.com/liquid-processing/pumps/   just make sure you search for "food grade" pumps