Contractor Amec last week lifted in a new high density polyethylene (HDPE) chamber and associated pipework to replace two aged combined sewer overows (CSOs) in a residential area in Ebbw Vale. The new component will provide additional capacity for wastewater during storm events and is part of Welsh Water's five-year capital investment programme. Designer for the scheme is Arup and both firms sit on the Dwr Cymru Welsh Water South-East Wales Alliance. Product supplier and manufacturer is Newport-based Asset International. Catchment agent for AMEC Simon Fisher, explained: 'We explored various types of modular systems, ranging from in-situ reinforced concrete, pre-cast concrete, and fabricated steel. At this particular location, the Asset Litespeed chamber was deemed suitable for the hydraulics of the wastewater network and also offered significant time savings.'