Stormwater Drainage Fittings

Full-Range HDPE Drainage Fittings

Urban stormwater networks need bends, traps and junctions at every change of direction. Our full range of HDPE drainage fittings - bends, traps, tees and junctions - connects stormwater collection pipelines that protect cities from flooding during heavy rainfall.

Lightweight yet tough, the fittings fuse quickly on site, withstand ground movement and corrosion, and form a sustainable, low-maintenance stormwater infrastructure with excellent flow characteristics.

Key Features

High-flow capacity for heavy rainfall events
Modular design for easy expansion
Permeable options for groundwater recharge
Low-maintenance systems
Environmentally sustainable solutions

Applications

Urban Areas

Stormwater management for cities and metropolitan regions.

Green Infrastructure

Sustainable stormwater solutions with permeable systems.

Stormwater Networks Sized for the Cloudburst

Climate volatility has turned 50-year storms into 5-year events. Our stormwater conveyance and retention systems are modelled on current rainfall reality, with capacity headroom built in.

Effective drainage engineering is about managing peak events, not average flow. Our systems are hydraulically modelled against design storm scenarios, with pipe sizing, gradient and access point spacing optimised to carry cloudburst loads without surcharge or sediment settlement.

Smooth-bore HDPE delivers a Manning coefficient around 0.009 - significantly better than concrete - which allows smaller diameters or flatter gradients for the same discharge capacity. Combined with chemical resistance against sewage aggressors, this keeps buried assets serviceable for over fifty years.

High Flow Capacity

Smooth bore walls reduce friction losses and maintain design velocity

Ring-Stiffness Options

SN4 to SN8 buried grades engineered for traffic load conditions

Chemical Immunity

Resists hydrogen sulphide attack and aggressive soil chemistry

Siphonic Expertise

Full-bore siphonic roof and ground drainage designed to BS EN 12056

Joint Integrity

Fusion-welded or rubber-ring joints sealed against infiltration and exfiltration

Long Service Life

50+ year design life with negligible maintenance intervention