Test Gauge, Inc. is one of the Nation's fastest growing suppliers of backflow products, repair kits, backflow repair kits, and Calibration Services. Our superior customer service is unmatched in the industry. We service the Illinois, Missouri, Minnesota, Iowa and Wisconsin areas. The Test Gauge Team prides themselves on providing excellent customer service, as well as technical assistance to the backflow technician. We not only listen to our customers but when our customer asks for a product we do not say "we can't get it" ... we find a way to get it. Whether it's a repair or installation questions, we can help you get the job done right the first time. Local experts, National Service ... that's Test Gauge.