Test Gauge® & Backflow Supply was formally known as Test Gauge Industries. The company was purchased in 2000 and moved from Mt. Prospect, IL to Elgin, IL. In 2003 the decision was made to take a calibration company into a full master parts distributor, which then led to Test Gauge® being one of the nation's fastest growing parts supplier. At Test Gauge we pride our selves on customer service. We not only listen to our customers but when our customer asks for a product we do not say we cant get it, we find a way to get it. Our superior customer service is unmatched in the industry, from our calibration services all the way to installation of devices, you can always count on us. Test Gauge & Backflow Supply has over 35 years of experience in the backflow industry. Test Gauge and Backflow Supply prides itself on providing technical assistance to the backflow technician. Whether it's a repair or installation questions, we can help you get the job done right the first time.