The UMAC Brand has served the natural gas industry since 1970. In 1974, UMAC EFVs became the premier Excess Flow Valves used on gas service lines to protect homes and businesses.

Since their introduction millions of UMAC Brand EFVs have been sold (More than 5 times as many valves as all US competitors combined) and installed worldwide, providing tens of billions of field service hours. Today the UMAC Excess Flow Valve is known as "The EFV of Choice."

UMAC EFVs are manufactured, by GasBreaker a Division of Hubbell Gas Connectors and Accessories (HGCA). UMAC EFVs are available in a wide variety of models that can accommodate service line capacities for both residential and commercial applications. GasBreaker's highly trained technical and production staff is experienced in all areas of EFV research, development, engineering and quality control.

With GasBreaker, Continental Industries and Lyall HGCA (Hubbell Gas Connectors and Accessories) is positioned to offer the most complete like of products in the industry, form mail to meter to midstream and transmission. The HGCS group has over 135 years of combined history serving the natural gas industry. This means you will receive superior quality, service and selection for years to come.