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GasBreaker Excess Flow Valve

GasBreaker is the world's leading automatic safety valve for gas service lines. Explore our selection of industry-trusted models designed for all residential and commercial capacities.

The UMAC Brand has served the natural gas industry
since 1970.


Improve environmental impact by reducing amount of methane escaping into the atmosphere.


Excess Flow valves are installed underground where the gas service line joins the main.


GasBreaker: The Excess Flow Valve of Choice

The GasBreaker brand has manufactured high-quality flow valves for both residential and commercial applications for over 50 years. In 1974, GasBreaker EVFs became the premier Excess Flow Valves for use on gas service lines to protect homes and businesses.

In the years since, GasBreaker EFV has remained the first choice Excess Flow Valve for gas service lines, selling millions of units (more than five times as many as all US competitors combined) and providing tens of billions of field service hours. Today, the GasBreaker EFV is known across the world as the “flow valve of choice.”

Residential and Commercial Gas Safety

The GasBreaker EFV is manufactured in a wide variety of models that can accommodate service line capacities for both residential and commercial applications. Our highly trained technical and production staff is experienced in all areas of EFV research, development, engineering, and quality control.