The latest guide to rainwater systems from OSMA, supplier of plastic systems for building, construction and utilities – is a comprehensive and detailed reference work that the company says is invaluable to installer and specifier alike. <br> <br> Designed as a practical design tool, the publication – Rainwater Systems Product, Design and Installation Guide – works its way through a general overview of the gutter and downpipe products through to a system selector that will narrow down the products suitable for a specific project, including which products are compatible with other rainwater systems on the market. The guide then goes into greater detail on the six rainwater gutter profiles – which include half-round, semi-elliptical, or square/profiled –and the domed roof outlets for flat roofs, listing the pipe, gutter and outlet components. <br> <br> OSMA rainwater systems are backed by a comprehensive technical advisory service from Wavin. This service provides expert assistance at every stage of a project, from planning and product selection to installation and maintenance. <br> <br>