What solvent for parts washer?

In Canada, it's called solvent. Most of our part houses carry it, in up to 5 gal cans. May also go by ." Varsol, paint thinner, ". I have found putting up to a couple of gals of water in the bottom, not enuff for the pump to suck. It's way cheaper than using all solvent, AND, debris, solids, etc settle into the water and sink, separated from the cleaner, it stays cleaner longer. There is a down side, that in a few yrs the reservoir may leak from rusting. For me it's just a new lube barrel to replace.. cheers . . Try
Walmart
paint Dept.