Wavin Osma RoundLine is a 112mm gutter system with a circular 68mm downpipe, designed for domestic standard use. It is suitable for roof areas up to 163m² with a single downpipe. This hydrodynamic outlet effectively handles rainwater, connecting the RoundLine gutter to a 68mm downpipe. It features a concealed socket to hide the downpipe cut end and retained seals for a secure, watertight installation. The product conforms to BS EN 607:2002. The range is available in black, grey, white, and brown.