Standard 110mm (4 Inch) PVC Gully Trap, Wastewater Drainage Fitting

110mm PVC Gully Trap

The Standard 4 Inch Gully Trap serves as a fundamental collection point for wastewater and surface runoff within a gravity-fed drainage system. Constructed from high-density uPVC, this component effectively isolates the main sewer line from the atmosphere. It utilizes a permanent water seal to prevent hazardous sewer gases from venting back through waste pipes or surface drains into the building environment.

Built for the Job

Plumbers and groundworkers install this fitting at the transition point between vertical discharge pipes and horizontal underground runs. The unit provides a robust barrier against debris, preventing large solids from entering the main 110mm pipework where they could cause significant blockages. Its chemical-resistant properties make it suitable for handling domestic detergents and mildly acidic groundwater without degrading. The smooth internal bore ensures high flow rates and minimizes the buildup of silt or organic matter within the trap body.

• Collection of wastewater from kitchen or bathroom discharge stacks.

• Integration into surface water systems for rainwater downpipe termination.

• External drainage points in commercial wash-down areas or residential yards.

Product Highlights

Durable uPVC Construction

The material resists impact and environmental stress cracking during backfilling and long-term ground movement.

Standard Compatibility

• Matches standard 110mm (4 inch) underground drainage pipework.
• Compatible with standard gully grates and hoppers.

Technical Specifications

What’s Included

• 1 x 110mm (4 Inch) uPVC Gully Trap Body

On-Site & Workshop Notes

• Ensure the trap is set on a level, compacted granular bed to prevent uneven settlement after installation.

• Maintain a minimum water seal depth of 50mm as per local building regulations to ensure odor control remains effective.

• Use silicone lubricant on seals if connecting to push-fit systems to avoid gasket displacement.

• Clean the interior of the fitting thoroughly before final inspection to remove any construction debris or concrete splashes.