Air Conditioning Pipe & Pipework
Everything needed for AC pipework installation — from ACR copper tube and pipe insulation to fittings, supports, and condensate drainage. Stocked for HVAC engineers, refrigeration contractors, and AC installers across the UK.
Correct pipework selection is critical to system performance, efficiency, and longevity. Undersized pipe increases refrigerant velocity and pressure drop; uninsulated pipe causes condensation, energy loss, and potential water damage. This hub covers every element of a complete AC pipework installation.
Browse by pipework type
- Copper Pipe for Air Conditioning & Refrigeration — ACR-grade copper tube in imperial sizes (1/4", 3/8", 1/2", 5/8", 3/4", 7/8" OD). Suitable for R32, R410A, R22, and all common refrigerants. Available in straight lengths and coils.
- Pipe Insulation — Armaflex, K-Flex, and Class O insulation tube for AC line sets. Available in 9mm, 13mm, and 19mm wall thickness to suit different pipe sizes and application requirements.
- Fittings & Connectors — Compression, solder, and flare fittings for ACR copper pipe. Includes elbows, tees, reducers, and unions for all standard pipe sizes.
- Pipe Supports, Fixings & Hangers — Clips, brackets, and hangers for securing AC pipework to walls, ceilings, and structural elements. Suitable for insulated and bare pipe.
- Condensate Drain Hose — Flexible condensate hose for routing drain water from indoor units to suitable discharge points.
Pipework sizing guide
AC copper pipe uses imperial OD sizing (outside diameter) — this is different from plumbing copper pipe which uses metric OD. Always specify pipe by OD when ordering for refrigeration and air conditioning work. Common sizes:
- 1/4" OD — liquid line on small split systems
- 3/8" OD — suction line on small split systems; liquid line on larger systems
- 1/2" OD — suction line on medium split systems
- 5/8" OD — suction line on larger domestic and light commercial systems
- 3/4" and 7/8" OD — commercial and multi-split applications
Related guides
See our nitrogen pressure testing guide and system evacuation guide for commissioning best practice after pipework installation.
