Flow Control/Monitoring, Stormwater Treatment and Pretreatment

Catch basin risers Catch basin risers from American Highway Products eliminate debris falling into collection systems causing backups, reduce costs, and streamline the adjusting of utilities to the new grade when paving roads. Heights start at 3/4-inch rise and increase in 1/4-inch increments. Inclined risers are available. The type 1 and type 2 risers are easy to install, and will not break from installation forces or uneven manhole frames. Custom designs are available. 888/272-2397; www.ahp1.com. I&I barrier The I&I barrier from AP/M PERMAFORM is designed to stop water from leaking into manholes through grade rings. The weather- and puncture-resistant unit is made of