110mm Drain Gully Extension (UGC4)

The 110mm drain gully extension (UGC4) is a specialist drainage accessory developed to raise the height of an existing gully unit to match finished surface levels. This extension piece helps ensure the gulley grate sits flush with paving, driveways or other ground finishes, preventing trip hazards and helping maintain efficient surface water collection.

Manufactured from high quality uPVC, the extension delivers excellent resistance to corrosion, chemical exposure and ground pressure commonly encountered in underground drainage installations. Its simple connection to standard 110mm gully outlets makes it an efficient and reliable solution for levelling and adjustment.

110mm Drain Gully Extension (UGC4) – Key Features & Benefits

• Designed to extend the height of 110mm drain gulley units
• Strong uPVC construction for durability and long service life
• Simple connection to standard 110mm gulley outlets
• Helps ensure the grate sits at the finished level
• Smooth internal surface maintains efficient water flow
• Suitable for domestic and commercial drainage systems

Installer Benefits

• Quick and straightforward to install with compatible 110mm gully components
• No specialist tools required for connection
• Lightweight design for easier handling onsite
• Helps achieve a neat and level gulley installation
• Compatible with a variety of AquaFlow and standard gully systems

Applications

• Raising gully grates to finished surface level
• Adjustment of gulley height on driveways and patios
• Domestic and commercial drainage layouts
• Improving drainage alignment in renovation and new build projects
• Accessory for surface water collection systems

Performance & Durability

Designed for use below ground, the 110mm drain gully extension (UGC4) provides dependable performance even in demanding soil and surface water conditions. The robust uPVC material resists corrosion, chemical attack and environmental stress, ensuring the extension piece maintains its structural integrity over time.

When installed correctly as part of a compliant drainage layout, the gully extension helps maintain smooth internal flow and supports efficient surface water drainage. Its role in achieving the correct finished level enhances both functionality and appearance of the drainage system.

Installation

Before installation, ensure the gulley outlet and extension surfaces are clean and free from debris. Insert the extension securely onto the existing gully outlet and confirm that it is seated correctly. Check levels to ensure the gulley grate will sit flush with the finished surface. Support the extension with suitable bedding and backfill materials in accordance with underground drainage installation standards.

Product Specifications

• Material: uPVC
• Nominal Diameter: 110mm
• Type: Drain gully extension (UGC4)
• Connection Type: Gully outlet socket
• Application: Surface water drainage systems