110mm Underground Back Inlet Roadable Gully

The 110mm Underground Back Inlet Roadable Gully by Kalsi Group is a heavy-duty PVC-U drainage fitting engineered for underground gravity drainage and sewerage systems in both residential and commercial applications. Designed and manufactured in Birmingham by Kalsi Plastics — a Made in Britain verified producer — this gully combines a back inlet connection with a load-bearing roadable grid, making it the go-to choice for installations beneath driveways, car parks, and other trafficked surfaces.

Key Features and Specifications

• Material: PVC-U (Polyvinyl Chloride Unplasticised) body for long-term durability and chemical resistance
• Grid: Polypropylene roadable grid — load-bearing, suitable for vehicular and pedestrian trafficked areas
• Diameter: 110mm — fits standard UK underground drainage pipe
• Back inlet: Rear socket connection for tying additional waste or rainwater inlets into an existing drain run
• Rodding access: Built-in rodding point through the grid for easy clearance of blockages without excavation
• Installation depth: Suitable for gravity drainage applications up to 10m depth
• Colour: Mid brown (terracotta) — standard for underground drainage
• Compliance: Manufactured to BS EN 1401-1 and BS 4660:2000
• Compatibility: Interchangeable with Hepworth, Marley, OSMA/Wavin, Polypipe, Hunter, Floplast, and Brett Martin 110mm systems

Applications

• Driveway and car park drainage where a load-bearing roadable gully is required
• Connecting new waste or rainwater inlets into an existing 110mm underground drain run
• New-build residential and commercial drainage installations
• Refurbishment and extension projects requiring a back inlet gully connection
• Gravity sewerage systems in gardens, patios, and external areas

Why Choose This Product

The Kalsi Group 110mm Underground Back Inlet Roadable Gully is UK-manufactured to recognised British Standards, ensuring reliable compliance on inspected builds. Its roadable grid sets it apart from pedestrian-only alternatives, offering genuine versatility across trafficked and non-trafficked installations. Full compatibility with all major 110mm drainage brands means no costly adapters. Trade quantities are welcome, and the product is competitively priced for both one-off DIY purchases and bulk contractor orders.

Delivery in and Around London

We deliver the Kalsi 110mm Back Inlet Roadable Gully across London and the surrounding region, including inner boroughs such as Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas including Enfield, Bexley, Redbridge, and Barnet. We also supply to the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Trade quantities are welcome — contact us for volume pricing and scheduled delivery options.