Check-All Valve Mfg. Co. manufactures a complete line of in-line spring-loaded check valves with world wide service. Check-All Valve serves a wide range of industries including chemical, petrochemical, pharmaceutical, food & beverage, water treatment and many others. Check-All Valve is ISO 9001-2000 Certified and manufactures product lines compliant with CE/PED requirements, Canadian Registration Number guidelines, 3A Sanitary Standards and others.