Backflow testing and recertification for municipal and other governmental requirements are central product and service areas for us at ISI. We are a sales, service center, and stocking distributor for Mid West Instrument which is the leading manufacturer of backflow testing equipment.

For the past 30 years Mid-West Instrument has been producing Quality Backflow Test Kits that have set the standard in the industry. Our Model 830 has been the benchmark of the industry for decades.


Constant input from field testers led to refinements such as inline filters, laminated test procedures, removable lids, soft seated needle valves & line pressure gauges.

For the past 30 years Mid-West Instrument has been producing Quality Backflow Test Kits that have set the standard in the industry. Our Model 830 has been the benchmark of the industry for decades. Constant input from field testers led to refinements such as inline filters, ...