Water and Wastewater

Our work in the Water and Wastewater Sector

Our two decades of experience in the water industry has built a reputation for delivering the full spectrum of water and wastewater treatment projects, with turnkey solutions for design, installation and commissioning.

Our regular, reactive and emergency support is relied upon by a broad range of water companies all over the UK, with an efficient, effective and environmentally friendly water and wastewater service.

Our Full Capabilities

From potable and raw water systems to sewer risings mains, sewer replacement, refurbishment and more, we work closely with treatment facilities, water and wastewater networks.

Water catchment, reservoir construction and refurbishment.

Design and feasibility of new pipelines.

Trunk main cleaning and large diameter pipe laying.

Working on non-infrastructure water treatment plants.

The construction of new and rehabilitating of old Victorian water mains.

Repairing leaks and bursts on the water network.

Network management and construction of district metering points and Pressure Reducing Valve (PRV) set ups.

Undertaking drainage repairs to public sewer networks including re-lining.

Construction of sewage pumping stations.

Horizontal directional drilling of new rising mains.

Trunk sewer and large diameter sewer construction.

Combined sewer outfalls.

Construction of sewage treatment plant.

Our expertise means that we can deliver cost-effective and reliable solutions to a wide range of clients. From design to installation and commissioning, our in-house support includes undertaking initial route selection, site and desktop investigations, streetworks management, site construction, connection to existing mains, chlorination, testing and commissioning.

Case Studies

Thames Water – Axford Pipeline

This project was for the construction of a 17.6km clean water pipeline including the construction of a new water Booster Station, modifications to Whitefield Reservoir and its valve house and the construction of nineteen HDDs (Horizontal Directional Drilling) crossings of areas of significant engineering difficulty. The works formed part of an overall scheme to provide […]

DCWW – Aberbaidan Primary Settlement Tank

As part of a scheme to design and build a new Primary Settlement Tank (PST), OCU were contracted by Dwr Cymru Welsh Water (DCWW) as part of our Pressurised Pipework Framework Contract to carry out the design and installation of a new 10m Diameter Primary Settlement Tank (PST) with all associated civil, mechanical, electrical and […]

DCWW – Pressurised Pipeline Systems

OCU is currently a Dwr Cymru Welsh Water (DCWW) framework contractor on the Pressurised Pipeline Systems and Emergency Response Works contract; a design and build framework. All works are completed with full compliance in accordance with the duties of Principal Contractor as defined by CDM Regulations 2015. This current arrangement is a follow-on from our […]