Precast concrete manhole SUDS

Sustainable Drainage Systems (SuDS) have been introduced following the increase in urbanisation, which has increased flash flooding after rainfalls. To combat these problems the Environment Agency has been promoting the use of Sustainable Drainage Solutions (SuDS). The Planning Policy Guidance Note 25 for England on Development and Flooding, emphasises the role of SuDS and introduces a general presumption that they will be used. SuDS will probably feature increasingly in such guidance documents, as they are revised. SuDS is a process for achieving integrated surface water drainage design with the objectives of: Reducing the risk of flooding from developments. Minimising pollution arising from surface water runoff to groundwater. Maintaining recharge to groundwater. Better use of water resources. Improvement to water amenity & biodiversity. Marshalls CPM has developed a range of SuDS products to counter this and try to replicate natural systems using cost effective precast solutions: Circular Pipes Rigid precast pipeline systems with flexible joints are used for the conveyance of storm-water and foul-water. Perforated pipes enable storm-water to percolate into the ground Ovoid Pipes An egg shaped pipeline system that has better velocity characteristics at low flow than equivalent circular pipes Flat Pack Tanks Modular attenuation tank systems, made from precast panels produced under factory conditions Sealed Manholes An off-site watertight solution pre-benched and configured to the required inlet/outlet orientation, ensuring less wet wells on site