building supplies of polymer concrete and fiberglass for surface draining and parts therefor, all sold separately or as a unit, namely, catch basin, drains, trench drains, and drainage channels for collecting and discharging surface water, end caps, pipe outlets, channel grates/covers, and locks and rails/frames therefor, containment channels, spill containment boxes, spill containment curbing and liquid barriers, sump boxes, channel brace and installation aid, channel chair, channel extensions, strainers; non-metal prefabricated building supplies for forming boarders and curbs; non-metal prefabricated sand catching basins and sand screens, pump support bases, drainage inspection shafts, pipe sockets for drainage installation, dirt sewers and slider couplings therefor