Non-metallic pipes for building, namely, concrete pipes for drainage for gutters, sewers and stormwater drains; non-metallic curbs, non-metallic curbside drain pipes, non-metallic manhole covers, non-metallic pipes used vertically for stormwater drainage to be joined to horizontal drainage pipes; non-metallic roadside stormwater curb inlets used to channel stormwater from a roadway to a drainage network; non-metallic building elements, namely, concrete blocks, bricks, slabs, pavers and paveme...