StormDrain FSD-3009 6-inch Riser for 20-inch Drain Box Catch Basin
The StormDrain FSD-3009 6-inch Riser for 20-inch Drain Box Catch Basin is used to bring Source One Environmental 20 in. Catch Basins to grade. This riser combines all the best features of concrete and plastic risers with its patented riser system and heavy duty polyethylene construction that won’t shatter like some polypropylene risers. It features structural ribs inside to prevent frost from adhering to the riser. These risers hold their shape and are water and air tight. They are stackable (up to 3 risers) and screw together for assembly. These high quality risers are made in the USA.