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In 1969 Mr. Charles D. Peterson, an engineer for Universal Controls Corp., formed his own company, Peterson Equipment Co., Inc. A pressure & temperature test plug was designed and produced. It not only allowed pressure readings, but temperature readings as well in a ¼" NPT brass housing. This allowed for the use of a 1/8" diameter pressure needle to be developed that would not bend or become clogged like the old standard football needle. The new design has two self closing valves for rapid sealing upon removal of the needle or temperature probe. This is what started the use of a pressure and temperature test plug called a "Pete's Plug®".

The "Pete's Plug®" is used by the Natural Gas & Hydronic Industries as well as numerous other applications. It is produced in the United States, England & Australia. Sales of the Pete's Plug® are over 20 Million units in the last 30 years and is the standard pressure or temperature test plug used by many companies throughout the world.