International Valve is the manufacturer of the Vent-Tech line of air/vacuum relief valves for municipal and industrial wastewater and water applications. Vent-Tech’s patented design offers significant advancements in combination air relief valve technology. Headquarters and manufacturing are located in Sugar Grove, IL. We produce Vent-Tech air release valves that are American Iron & Steel (AIS) compliant.
https://www.linkedin.com/company/international-valve-marketing-llc