Easier Backflow Installs

The Ames Deringer™ lightweight backflow assemblies save time, space, and money. Deringer Backflow Preventers are easy to install and ship right to your job site. 

The Deringer 20 Double Check Valve Assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions. It's only 18.7 inches long and weighs just 42 lbs, making it the shortest and lightest in the industry. 

The smallest, lightest, most economical, best performing, and only all stainless steel backflow preventer. Period.