Containment & Filtration Solutions is the industry leaders in utilizing your stromwater system as a means of secondary containment. CF Guardian™ will proactively and completely contains spill above ground with our unique complete shut off capabilities. CF-S products are engineered approved secondary containment, eco-friendly, stainless steel storm drain inserts that can be installed into your existing storm drain and allows the control of flow, and capturing sediments, oils, trash, sheen, and other pollutants to protect the environment, avoid fines, and comply with EPA regulations.