Compression Couple Female C X Fi - 28Mm X 1'

Compression Couple Female C X Fi - 28Mm X 1'

The 28mm x 1" Compression Female Straight Coupler is a heavy-duty transition fitting used to connect 28mm copper pipe to a 1" BSP (British Standard Pipe) male threaded connection. This fitting is a staple in high-flow domestic plumbing and commercial heating systems, particularly when connecting primary pipework to large pumps, boiler manifolds, or unvented hot water cylinders.

The compression end provides a secure, mechanical joint on the 28mm copper pipe, while the 1" female thread (FI) allows for a robust connection to threaded valves or plant equipment.

Key Features and Specifications

Size: 28mm Compression x 1" BSP Female Thread.

Joint Type: Mechanical Compression (C) on the pipe side; Female Iron (FI) internal thread on the other.

Material: High-quality forged brass, manufactured to BS EN 1254-2 standards.

Suitability: Designed for use with R250 (half-hard) 28mm copper pipe.

Sealing: The threaded side typically requires a 1" fiber or rubber washer, or the use of PTFE tape/jointing compound on the mating male thread.

Components: Supplied complete with a 28mm brass nut and a high-grade copper or brass olive.

Pressure Rating: Suitable for high-pressure commercial and domestic water and heating environments.

Common Applications

Cylinder Connections: Connecting 28mm primary flow/return pipes to the 1" male tappings on large unvented hot water cylinders.

Pump Unions: Adapting 1" male threaded pump valves or headers to 28mm copper distribution lines.

Commercial Manifolds: Joining 28mm main circuits to 1" threaded distribution manifolds in plant rooms.

Large-Scale Filtration: Connecting main water supplies to 1" threaded commercial water filters or softeners.

Essential Companion Products

Sealing: 1" BSP Fiber / Rubber Washers or PTFE Thread Sealing Tape

Pipework: 28mm Copper Pipe (3m or 2m lengths)

Jointing: Jointing Compound (e.g., Jet Blue or Boss White)

Tooling: Wide-Opening Adjustable Spanners or Water Pump Pliers

Specialist Support and Local Collection

Handling a high-flow commercial or domestic installation? We stock a full range of large-format compression-to-thread adaptors, including 28mm and 35mm fittings with 1" and 1 1/4" threads.

Visit our trade counter at 61 Fullers Road, E18 2QB for immediate collection and expert advice on connecting primary pipework to plant room equipment.