Slow Flow – PE Corrugated Pipes for High-Slope Networks

Slow Flow is a specialised double-wall corrugated pipe system manufactured from high-density polyethylene (HDPE), designed specifically for drainage installations on steep gradients. The system features a corrugated external surface combined with an engineered inner profile incorporating artificial macro-roughness (AMR), which helps regulate and reduce flow velocity in high-slope applications.

Available in black, the range covers DN/OD sizes from 200 mm to 500 mm and is supplied in straight lengths for efficient handling and installation. It is particularly suited to drainage networks where controlling hydraulic velocity is essential to maintaining system stability and performance.

The hydraulic behaviour of the system has been independently tested at a certified engineering laboratory within a university faculty in Italy.

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Description

Features & Benefits

  • Controlled Flow Performance
    Designed to reduce water velocity on slopes of up to 20%, helping to stabilise hydraulic behaviour in steep drainage systems.
  • Reduced Infrastructure Requirements
    Helps minimise the need for drop manholes, reducing installation complexity, cost and system footprint.
  • High Structural Strength
    Rated to SN8 ring stiffness, ensuring reliable performance under external loading conditions.
  • Engineered Internal Surface
    The wavy inner profile with macro-roughness is specifically designed to dissipate energy and regulate flow velocity.
  • Secure Jointing Options
    Compatible with socket or coupling connections using sealing gaskets, ensuring watertight and dependable connections.
  • CorPress Compatibility
    Can be integrated with CorPress joint systems for enhanced sealing performance and installation flexibility.
  • Lightweight and Easy to Install
    Reduced weight compared with traditional materials allows for faster installation and easier handling on site.
  • Excellent Chemical and Abrasion Resistance
    Manufactured from HDPE, providing strong resistance to aggressive chemicals, corrosion and abrasive flow conditions.
  • Electrically Non-Conductive
    Inert to stray electrical currents, eliminating corrosion risks in underground environments.
  • Environmentally Responsible
    Fully recyclable construction supports sustainable infrastructure development.