Plastic Compression Coupling White - 40mm

Plastic Compression Coupling White - 40mm

The 40mm White Plastic Compression Straight Coupling is a highly versatile "universal" waste fitting used to join two lengths of 40mm waste pipe. Because it uses a mechanical compression seal rather than solvent weld glue, it is compatible with multiple pipe materials, including PVC-u, Polypropylene, and ABS.

This fitting is a favorite for repairs and retrofits because it can be easily disassembled for cleaning or system alterations. The white finish is the standard choice for internal domestic plumbing, typically found under kitchen sinks and within utility rooms.

Key Features and Specifications

Size: 40mm (1 1/2" nominal) – The standard diameter for kitchen sinks, washing machines, and dishwasher discharge.

Joint Type: Mechanical Compression (Dual-end).

Components: Includes the fitting body, two threaded compression nuts, two plastic friction washers, and two high-grade rubber conical seals.

Material: Durable Polypropylene; resistant to boiling water and common household chemicals.

Tool-Free: Designed for hand-tightened installation, making it ideal for use in restricted spaces where wrenches are difficult to maneuver.

Finish: Gloss White, matching standard internal waste pipework.

Common Applications

Pipe Repairs: Replacing a damaged section of 40mm waste pipe where the exact material of the existing pipe is unknown.

Under-Sink Plumbing: Joining the outlet of a sink trap to the main waste run.

Kitchen Renovations: Extending waste lines for new washing machine or dishwasher positions.

Temporary Drainage: Used in scenarios where the pipework may need to be moved or dismantled in the future.

Essential Companion Products

Pipework: 40mm Push-Fit or Solvent Weld Waste Pipe - White

Lubricant: Silicone Grease (Helpful for ensuring the rubber seal seats perfectly without twisting)

Support: 40mm Waste Pipe Clips - White

Alternative: 40mm Solvent Weld Straight Coupler (For a permanent, non-removable joint)

Specialist Support and Local Collection

Dealing with a leak under the sink? Compression fittings are the most forgiving option for DIY repairs and quick trade fixes. We stock a full range of 32mm, 40mm, and 50mm compression waste fittings in White, Black, and Grey.

Visit our trade counter at 61 Fullers Road, E18 2QB for immediate collection. Our team can help you identify your pipe size and ensure you have the correct seals for a watertight job.