UMAC INC.
5 GREAT VALLEY PARKWAY
SUITE 210
MALVERN, PA 19355
610-407-7205
610-407-7211 FAX

UMAC, Inc. has served the natural gas industry since 1970. In 1974, UMAC developed and distributed the Donkin Flow Limitor® which is known today as The UMAC Excess Flow Valve used on gas service lines to protect homes and businesses. In 2009, the UMAC Brand Excess Flow Valve joined the GasBreaker, Inc. family of EFVs for residential, commercial high and low pressure gas service lines.

In addition we represent and distribute products made by Covalence Heat Shrinkable Products, such as Covalence® Shrink Sleeves for corrosion protection.

To view a video from 1999 of the UMAC Excess Flow Valve, click here.



UMAC, GasBreaker, Donkin Flow Limitor, and Excess Flow are registered trademarks.