Outfalls and Pipelines

We specialise in delivering high-performance outfall and pipelines solutions for the water infrastructure sector and on development sites. From long sea outfall installations to precision pipeline slip lining and drainage infrastructure, our experience, technical capability, and environmental awareness make us a trusted partner for even the most complex and challenging projects.

Our team brings together decades of specialist marine and civil engineering knowledge to drive design, construct, repair, and upgrade outfall systems and pipelines that are robust, sustainable, and fully compliant with environmental regulations.

Our Specialist Capabilities

Drainage Outfalls for Development Sites

We drive robust, buildable design and install tailored drainage outfall systems to serve new developments and major infrastructure projects. Whether it’s a cooling water pipelines for an energy site or a stormwater discharge outfall for a residential scheme, we deliver bespoke solutions that meet planning and environmental criteria while ensuring long-term durability and resilience.

Take a look at how we bring technical innovation, environmental care, and engineering precision together in this animated video below.

This video shows the complex and environmentally sensitive civil engineering project at McArthur’s Yard, Bristol. Commissioned by The Hill Group and delivered by Kaymac Marine & Civil Engineering Ltd., this video showcases the full scope of our Harbour Outfall Installation works — from site setup to demobilisation.

Pipeline Slip Lining

Our pipeline slip lining service allows for the rehabilitation of ageing or damaged outfalls without the need for full excavation or replacement. This minimally invasive technique is cost-effective, reduces environmental impact, and significantly extends the life of existing infrastructure. We have extensive experience in applying this method in both tidal and non-tidal environments.

Effluent Long Sea Outfall Installations

We deliver turnkey long sea outfall systems, designed to convey treated effluent safely offshore. Our services cover the full lifecycle of a project—from early contractor involvement and licensing to marine operations and commissioning. These systems play a vital role in safeguarding public health, habitats and the environment, and we bring the technical excellence required to ensure long-term functionality in dynamic tidal and coastal environments. Read about our latest project and watch our Project Video.

Our Experience with Outfalls and Pipelines

Our reputation for outfall and pipeline expertise is backed by a portfolio of successful projects across the UK. Explore some of our recent works below:

Each of these projects showcases our ability to manage environmental risk, operate in live tidal and marine conditions, and deliver engineering excellence on time and to budget.

Why Kaymac?

Specialist Expertise – Decades of experience delivering complex marine and coastal infrastructure.
Turnkey Solutions – From surveys and permitting to construction and final connection.
Environmental Focus – Proven ability to operate within Sites of Special Scientific Interest (SSSIs) and sensitive habitats.
Collaborative Delivery – Close partnerships with clients, designers, regulators, and stakeholders.
Innovation and Adaptability – Using advanced trenching, submersion, and pipeline protection techniques.

Whether you require a new outfall installation, rehabilitation of existing pipeline assets, or tailored drainage infrastructure for your site, Kaymac is ready to support. Contact us to find out how we can help deliver your next project with confidence and care.