Abstract: A modular chamber assembly comprising: — (i) one or more base portions, said base portion incorporating one or more spigots; (ii) a riser portion; (iii) optionally a lid to close the top of the riser portion; the base portion(s) and riser portion being adapted to nest one on top of another.

Abstract: A sump assembly (70) comprising: (i) a sump body (71) including a bottom and at least one side wall (72), the bottom and side wall(s) co-operating to define an open topped internal cavity within the sump body capable of containing fluids, the side walls further defining an opening (76) in the top of said sump; (ii) at least one flange (77) extending outwardly from the side wall(s), the flange incorporating fixing means (79) adapted, in use, to tie the sump into the surrounding structure; (iii) a mounting frame assembly (90) adapted, in use, to be keyed into the surrounding structure and to secure a dispensing unit in place; wherein the sump body and the flange(s) are of unitary construction, the flange(s) being formed as an integral part of the sump body.