Brett Martin Underground offers a comprehensive range of drainage systems. It includes the Drain, Sewer, Perforated, Surface Water and Cable Duct systems.The entire range incorporates pipes and fittings in eight diameters from 53.9mm to 400mm. The range has been designed to offer the installer maximum choice and flexibility. Every product has been designed with ease of installation in mind. All products are manufactured to exacting standards ensuring the highest possible levels of performance.