Filterclose-icon
Brand open-filters-icon close-filters-icon
Brand
Category open-filters-icon close-filters-icon
Category
Manufacturer open-filters-icon close-filters-icon
Manufacturer
Coupling Types open-filters-icon close-filters-icon
Coupling Types
Outside Diameter open-filters-icon close-filters-icon
Outside Diameter
Bore open-filters-icon close-filters-icon
Bore
Length open-filters-icon close-filters-icon
Length
Misalignment - Parallel open-filters-icon close-filters-icon
Misalignment - Parallel
Misalignment - Angular open-filters-icon close-filters-icon
Misalignment - Angular
Torque Rating open-filters-icon close-filters-icon
Torque Rating
Misalignment - Axial open-filters-icon close-filters-icon
Misalignment - Axial
Depth open-filters-icon close-filters-icon
Depth
Width open-filters-icon close-filters-icon
Width
Fitting Type open-filters-icon close-filters-icon
Fitting Type
Interface Type open-filters-icon close-filters-icon
Interface Type
LAN Category open-filters-icon close-filters-icon
LAN Category
Shield Type open-filters-icon close-filters-icon
Shield Type
Type open-filters-icon close-filters-icon
Type
Material open-filters-icon close-filters-icon
Material
Number of Ports open-filters-icon close-filters-icon
Number of Ports
Finish open-filters-icon close-filters-icon
Finish
Colour open-filters-icon close-filters-icon
Colour
Series open-filters-icon close-filters-icon
Series
Compatible Pipe Size open-filters-icon close-filters-icon
Compatible Pipe Size
Select quantity close-icon
RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat5e, UTP

RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat5e, UTP

RS Stock No. 266-2257

Brand RS Pro

  • Category: Ethernet Couplers
  • LAN Category: Cat5e
  • Wiring Configuration: Straight Through

AED 36.99

in stock now

View more
Select quantity close-icon
RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat6, UTP

RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat6, UTP

RS Stock No. 266-2259

Brand RS Pro

  • Depth: 25mm
  • LAN Category: Cat6
  • Shield Type: Unshielded

AED 44.82

in stock now

View more
Select quantity close-icon
RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat5e, UTP

RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat5e, UTP

RS Stock No. 266-2258

Brand RS Pro

  • Category: Ethernet Couplers
  • Depth: 25mm
  • Shield Type: Unshielded

AED 36.99

in stock now

View more
Select quantity close-icon
RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat6, UTP

RS PRO 2-Port RJ45 Female Punch Down Coupler, Cat6, UTP

RS Stock No. 266-2260

Brand RS Pro

  • LAN Category: Cat6
  • Length: 30mm
  • Wiring Configuration: Straight Through

AED 44.82

in stock now

View more
Select quantity close-icon
RS PRO Coupler, Conduit Fitting, 25mm Nominal Size, Steel

RS PRO Coupler, Conduit Fitting, 25mm Nominal Size, Steel

RS Stock No. 060-6046

Brand RS Pro

  • Category: Cable Conduit Fittings
  • Nominal Size: 25mm
  • Standards Met: BS EN 50086

AED 159.20

in stock now

View more
Select quantity close-icon
RS PRO Coupler, Conduit Fitting, 25mm Nominal Size, 316 Stainless Steel, Silver

RS PRO Coupler, Conduit Fitting, 25mm Nominal Size, 316 Stainless Steel, Silver

RS Stock No. 471-1350

Brand RS Pro

  • Category: Cable Conduit Fittings
  • Fitting Type: Coupler
  • Material: 316 Stainless Steel

AED 403.90

in stock now

View more
Select quantity close-icon
RS PRO Coupler, Conduit Fitting, 25mm Nominal Size, Steel, Black

RS PRO Coupler, Conduit Fitting, 25mm Nominal Size, Steel, Black

RS Stock No. 060-8187

Brand RS Pro

  • Category: Cable Conduit Fittings
  • Finish: Enamelled
  • Fitting Type: Coupler

AED 165.38

in stock now

View more
Select quantity close-icon
RS PRO Flange Coupler, Conduit Fitting, 25mm Nominal Size, Steel

RS PRO Flange Coupler, Conduit Fitting, 25mm Nominal Size, Steel

RS Stock No. 061-9963

Brand RS Pro

  • Category: Cable Conduit Fittings
  • Fitting Type: Flange Coupler
  • Material: Steel

AED 468.01

in stock now

View more
Select quantity close-icon
RS PRO Flange Coupler, Conduit Fitting, 25mm Nominal Size, 316 Stainless Steel, Silver

RS PRO Flange Coupler, Conduit Fitting, 25mm Nominal Size, 316 Stainless Steel, Silver

RS Stock No. 471-1338

Brand RS Pro

  • Category: Cable Conduit Fittings
  • Material: 316 Stainless Steel
  • Nominal Size: 25mm

AED 756.54

in stock now

View more
Select quantity close-icon
RS PRO 2-Port Punch Down Wiring Box, Cat5, STP

RS PRO 2-Port Punch Down Wiring Box, Cat5, STP

RS Stock No. 340-9652

Brand RS Pro

  • Interface Type: Punch Down
  • Length: 25mm
  • Wiring Configuration: Straight Through

AED 55.12

in stock now

View more
Select quantity close-icon
RS PRO 2-Port Punch Down Wiring Box, Cat5e, UTP

RS PRO 2-Port Punch Down Wiring Box, Cat5e, UTP

RS Stock No. 340-9646

Brand RS Pro

  • Category: Ethernet Couplers
  • Interface Type: Punch Down
  • Shield Type: UTP

AED 31.92

in stock now

View more
Select quantity close-icon
RS PRO 2-Port RJ45 Feedthrough Connector, Cat6, UTP

RS PRO 2-Port RJ45 Feedthrough Connector, Cat6, UTP

RS Stock No. 916-0255

Brand RS Pro

  • Series: FT
  • Type: Feedthrough Connector
  • Width: 26mm

AED 62.13

in stock now

View more
Select quantity close-icon
RS PRO Jaw Coupling, 70mm Outside Diameter, 25mm Bore, 29mm Length Coupler

RS PRO Jaw Coupling, 70mm Outside Diameter, 25mm Bore, 29mm Length Coupler

RS Stock No. 018-3186

Brand RS Pro

  • Bore: 25mm
  • Coupling Types: Jaw Coupling
  • Length: 29mm

AED 91.40

in stock now

View more
Select quantity close-icon
RS PRO Jaw Coupling, 70mm Outside Diameter, 25mm Bore, 29mm Length Coupler

RS PRO Jaw Coupling, 70mm Outside Diameter, 25mm Bore, 29mm Length Coupler

RS Stock No. 018-4785

Brand RS Pro

  • Bore: 25mm
  • Category: Couplings
  • Coupling Types: Jaw Coupling

AED 88.86

in stock now

View more
Select quantity close-icon
RS PRO Gear Coupling, 25mm Outside Diameter, 14mm Bore Coupler

RS PRO Gear Coupling, 25mm Outside Diameter, 14mm Bore Coupler

RS Stock No. 810-0690

Brand RS Pro

  • Bore: 6 → 14mm
  • Category: Couplings
  • Misalignment - Parallel: 1mm

AED 71.94

in stock now

View more
Select quantity close-icon
HARTING RJ45 Socket/RJ45 Socket Coupler, Cat6, Shielded

HARTING RJ45 Socket/RJ45 Socket Coupler, Cat6, Shielded

RS Stock No. 765-9031

Brand HARTING

  • Interface Type: RJ45 Socket/RJ45 Socket
  • Length: 13.25mm
  • Width: 15.7mm

AED 101.48

in stock now

View more
Select quantity close-icon
Schneider Electric Coupler, Conduit Fitting, 25mm Nominal Size, uPVC, Black

Schneider Electric Coupler, Conduit Fitting, 25mm Nominal Size, uPVC, Black

RS Stock No. 513-6227

Brand Schneider Electric

  • Fitting Type: Coupler
  • Material: PVC
  • Nominal Size: 25mm

AED 33.08

in stock now

View more
Select quantity close-icon
Cinch Single-Port RJ45 Female Coupler, Cat5e, Shielded

Cinch Single-Port RJ45 Female Coupler, Cat5e, Shielded

RS Stock No. 885-7696

Brand Cinch

  • Category: Ethernet Couplers
  • Series Number: 30
  • Wiring Configuration: Straight Through

AED 79.38

in stock now

View more
Select quantity close-icon
Georg Fischer Plastic Pipe Fitting, Straight Coupler, 25mm

Georg Fischer Plastic Pipe Fitting, Straight Coupler, 25mm

RS Stock No. 196-9717

Brand Georg Fischer

  • Compatible Pipe Size: 25mm
  • Fitting Direction: Straight
  • Fitting Type: Coupler

AED 175.63

in stock now

View more
Select quantity close-icon
Legrand Medium Duty Coupler Set Pre-Galvanised Steel Cable Tray Accessory, 25mm Depth

Legrand Medium Duty Coupler Set Pre-Galvanised Steel Cable Tray Accessory, 25mm Depth

RS Stock No. 798-9531

Brand Legrand

  • Depth: 25mm
  • Material: Pre-Galvanised Steel
  • Series: Swifts

AED 48.90

in stock now

View more
Select quantity close-icon
Legrand Medium Duty Coupler Set Pre-Galvanised Steel Cable Tray Accessory, 50 mm Width, 25mm Depth

Legrand Medium Duty Coupler Set Pre-Galvanised Steel Cable Tray Accessory, 50 mm Width, 25mm Depth

RS Stock No. 798-9537

Brand Legrand

  • Accessory Type: Medium Duty Coupler Set
  • Series: Swifts
  • Width: 50 mm

AED 62.62

in stock now

View more
Select quantity close-icon
Georg Fischer Plastic Pipe Fitting, Straight Reducer Coupler, 25mm

Georg Fischer Plastic Pipe Fitting, Straight Reducer Coupler, 25mm

RS Stock No. 196-9718

Brand Georg Fischer

  • Compatible Pipe Size: 25 mm x 20mm
  • Section Link: https://ae.rsdelivers.com/category/mechanical-fluid-power-tools/plumbing-pipeline
  • Super Section Link: https://ae.rsdelivers.com/category/mechanical-fluid-power-tools/plumbing-pipeline/pipes-pipe-fittings

AED 145.81

in stock now

View more
Select quantity close-icon
Ruland Beam Coupling, 25mm Outside Diameter, 10mm Bore, 31.8mm Length Coupler

Ruland Beam Coupling, 25mm Outside Diameter, 10mm Bore, 31.8mm Length Coupler

RS Stock No. 081-4512

Brand Ruland

  • Misalignment - Angular:
  • Misalignment - Axial: 0.25mm
  • Outside Diameter: 25mm

AED 208.10

in stock now

View more
Select quantity close-icon
Ruland Beam Coupling, 25mm Outside Diameter, 12mm Bore, 38.1mm Length Coupler

Ruland Beam Coupling, 25mm Outside Diameter, 12mm Bore, 38.1mm Length Coupler

RS Stock No. 186-4104

Brand Ruland

  • Coupling Types: Beam Coupling
  • Length: 38.1mm
  • Misalignment - Parallel: 0.38mm

AED 370.55

in stock now

View more

...

What is a 25mm coupler?

A 25mm coupler is a connector designed to join two tubes, pipes, or conduits with a nominal outside diameter of 25 millimetres. It creates a continuous run by providing a secure, aligned joint between sections, enabling fluid, air, or mechanical transmission through the assembled system. In practice you’ll see 25mm pipe couplers used across plumbing, irrigation, HVAC, pneumatic and hydraulic lines, and industrial tubing. RS Components stocks a wide range of 25mm couplers to suit different materials and installation methods, including plastic, metal, and composite options.

Where are 25mm couplers typically used?

25mm couplers are common in:
  • Residential and commercial plumbing to join copper, PVC, or PEX piping
  • Irrigation and landscaping systems for garden hose and irrigation tubing
  • HVAC installations connecting ducting or flexible conduits
  • Industrial pneumatic and hydraulic lines using metal or composite tubing
  • Automotive and marine applications for fuel, coolant, or air lines
  • Conduit and electrical installations where 25mm external diameter conduit sections are joined
When selecting a 25mm coupler, consider the system fluid, pressure, temperature, and the installation method to ensure compatibility and performance.

What materials are 25mm couplers made from?

25mm couplers are manufactured from a range of materials to suit different environments and standards. Common options include:
  • Plastic such as PVC, CPVC, polypropene (PP), or nylon for lightweight, corrosion-resistant connections in plumbing and irrigation
  • Brass or stainless steel for high durability, higher pressure, and chemical resistance in industrial or potable-water systems
  • Aluminium or aluminium alloys for lightweight metal solutions in fabrications
  • Composite materials that combine strength and reduced weight for specialized applications
The right choice depends on the intended fluid or gas, temperature range, pressure rating, and compatibility with existing fittings.

What types of 25mm couplers are available?

Manufacturers offer several connection styles for 25mm couplers. Typical types include:
  • Push-fit (speed) couplers for quick, tool-free assembly on plastic or metal tubing
  • Compression couplers that use a compression nut and ring to seal around copper or steel tubing
  • Threaded couplers with male or female threads for threaded pipe systems
  • Solvent-weld (solvent cement) PVC/CPVC couplers for permanent PVC-based piping
  • Soldered or welded couplers for metal piping in high-strength applications
  • Adhesive or epoxy-bonded couplers for specific plastics or composites
Each type has its own installation method, pressure rating, and chemical compatibility, so choose based on your system design and maintenance needs.

How do I choose the right 25mm coupler?

Selecting the correct 25mm coupler involves evaluating several factors:
  • Application—plumbing, irrigation, HVAC, or industrial tubing
  • Material compatibility—water, chemicals, fuels, or air; check chemical resistance
  • System pressure and temperature—ensure the coupler rating matches operating conditions
  • Connection method—push-fit, compression, threaded, or solvent-weld
  • Size tolerances and fit—verify 25mm nominal diameter and outer diameter compatibility with the mating components
  • Ease of installation and maintenance—consider tool requirements and future disassembly needs
RS Components provides technical datasheets, material specifications, and compatibility notes to help you pick the right 25mm pipe or tube coupler for your project.

How do I install a 25mm coupler safely and correctly?

Safe, correct installation depends on the coupler type and material. General guidance:
  • Turn off supply lines and drain the system if required
  • Clean and deburr the tube ends to ensure a clean, square cut
  • For push-fit: ensure the tube is fully inserted to the stop; for threaded: apply appropriate sealant or PTFE tape; for compression: tighten the nut to manufacturer-specified torque; for solvent-weld: prime and apply solvent cement per instructions
  • Check for alignment, avoid over-tightening, and test for leaks under normal operating conditions
  • Use appropriate PPE and follow workplace safety protocols
Always consult the specific product datasheet from RS Components for exact installation steps and curing times, especially for solvent-weld and adhesive applications.

Are 25mm couplers suitable for potable water or other critical systems?

Many 25mm couplers are designed for potable water and food-grade or medical-grade applications, but you must verify the material and certification. Look for:
  • Compliance with standards (e.g., WRAS, DVGW, NSF/ANSI) depending on your region
  • Materials approved for drinking water contact (e.g., approved PVC, certain brass alloys)
  • Proper temperature and pressure ratings compatible with your distribution system
Always select a 25mm coupling that carries the appropriate certifications for potable use if that is your target application, and refer to RS Components’ product pages for specific approvals.

What maintenance and inspection practices apply to 25mm couplers?

Regular inspection helps prevent leaks and failures. Consider:
  • Visually inspect joints for signs of corrosion, cracking, or wear
  • Check for leaks after commissioning and after any system pressure changes
  • Replace damaged or aged fittings promptly to prevent water damage or equipment downtime
  • Store spare 25mm couplers in a dry environment and rotate stock to prevent material degradation
RS Components provides a broad portfolio of 25mm couplers with different materials and coatings to match your maintenance cycles and replacement needs.