FLOWVALVE LLC manufactures and sells high-quality pressure pipe unions and related oilfield control products. Flowvalve�s CNC manufacturing facility is located in Sulphur, Oklahoma, and covers over 200,000 square feet with over 200 CNC machines under roof. At FlowValve, employees share a common commitment to the quality of our products. All of our products are 100% manufactured and certified in the U.S.A., with complete traceability.