Profile: T. G. Rankin Co., Inc., offers liquid level gage and sight glass. We also provide gage glass, plumbing and industrial gages. Our plumbing equipment includes effluent, grinder, sewage, sump and utility pump. Our grinder pump is fitted with sharp cutters to shred solids, and move them under high pressure usually in a relatively small diameter pipe. It is used for lower flows and high pressure or higher head applications.