FlowMark manufactures vacuum trucks for portable restroom operators, septic service companies, carwash pit cleaners, oilfield service companies, grease trap operations, airport pit cleaning operations- the essential service providers of our country. We are only used by operators that are responsible for the sanitation of their facility. Our vacuum trucks are an essential piece of equipment for any service provider who cleans portable restrooms, grease trap operations, or carwash pit cleaners.