rainhead

Also called: rainwater head, rainwater sump

Standards

a collector connected to a downpipe at the end of a gutter, external to the building, that permits a free flow from the end of the gutter

Source - AS/NZS 2179.1:2014: Specifications for rainwater goods, accessories and fasteners

Standards

a collector of rainwater, generally of rectangular shape, at the end of a box gutter and external to a building, connected to an external downpipe

A rainhead has a similar function to a sump (see Clause 1.4.22).

Source - AS/NZS 3500.3:2018: Plumbing and drainage

HB50

funnel or box-shaped fitting for the collection and discharge of roof water from a gutter into a downpipe
See Figure A.30

Figure A.30: Gutters and downpipes