Residential, Commercial & Industrial

Hubbell Gas Connectors & Accessories, headquartered in Tulsa, Oklahoma with locations California, Wisconsin and Illinois. We engineer and manufacture, with a commitment to providing our customers the highest quality products at the best value.

GasBreaker a part of Hubbell Gas Connectors & Accessories has served the natural gas industry since 1970. In 1974, GasBreaker EFVs became the premier Excess Flow Valves used on gas service lines to protect homes and businesses. Since their introduction millions of GasBreaker 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 GasBreaker Excess Flow Valve is known as "The EFV of Choice.”


  • Accommodates pressures from 5 psi to 1000 psi (Depending on Series of EFV) 
  • Flow Ranges from 350,000 to 16,000,000 BTU 
  • Meet DOT 192.381 and MSS-SP-115 for excess flow valves for use in natural gas system 
  • Meet ASTM F 1802-97 Performance testing of EFVs 
  • Meet ASTM F 2138-01 Standard Specifications for EFVs 
  • Compatible with fittings and piping materials from most manufacturers
Click here to view our catalog


GasBreaker...manufacturers of Excess Flow Valves.



Performance Charts
Click a UMAC EFV Series from the menu below for pressure, flow, trip and reset characteristics of that series:




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SERIES 350 view download
SERIES 400 view download
SERIES 550 view download
SERIES 700 view download
SERIES 800 view download
SERIES 1100 view download
SERIES 1800 view download
SERIES 2600 view download
SERIES 5500 view download
SERIES 10000 view download
Propane (LPG) view download


Sizing Chart


To use our online Commercial Application sizing chart, click here.

Click Here for Valve Assembly Guide

Performace Charts

Click Here for Model Guide





1140 North 129th East Ave.
Tulsa, Oklahoma 74116
United States of America

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