For use with Great Basin™ hydromechanical grease interceptors (GB-50 and up), Big Foot™ gravity grease interceptors, Billy Goat™ solids interceptors, Sewer Viewer™ wastewater sampling ports (SV24 & SV24-O). Recommended for use in indoor installations. Features: Gas/water tight Pedestrian rated to 2,000 lbs. per CSA B481.0 Class M Cover material: glass reinforced polymer