AN Unions, Couplers & Joiners

The Seamless Connection for Your Plumbing System

When your fluid lines require extension, transition, or a modular connection point, our range of AN unions and couplers provides a professional, high-flow solution. At AN Fittings NZ, we understand that every join in your system is a potential point of failure or restriction. That’s why we stock only precision-machined Speedflow joiners, designed to maintain maximum internal diameter and ensure your fuel, oil, or coolant flows without interruption.

From simple hose-to-hose joiners to specialized bulkhead unions that pass through firewalls, these components allow you to build a plumbing system that is both functional and easy to service.

Precision Joiners for Every Configuration

Our collection covers the full spectrum of connection challenges, ensuring you have the right hardware to complete your run:

  • AN Flare Unions: High-pressure male-to-male joiners (from -3AN to -20AN) used to connect two hoses with female ends. Featuring a 37° flare for a perfect, metal-to-metal seal.

  • Bulkhead Unions: Essential for safely routing lines through firewalls, fuel cells, or chassis rails. Available in straight, 45°, and 90° configurations to keep your plumbing neat and secure.

  • AN Couplers (Female-to-Female): Used to join two male fittings or to adapt a component directly to another fitting.

  • Reducer & Expander Unions: The perfect solution for transitioning between different hose sizes (e.g., -6AN to -8AN) without adding unnecessary weight or bulky adapters.

  • Swivel Couplers: Allowing for 360-degree rotation during installation to prevent hose twist and simplify assembly in tight engine bays.

Reliability for the New Zealand Motorsport Scene

Built from high-grade 6061-T6 aluminum and finished with hard-wearing anodizing, our unions and couplers are designed to withstand the vibration and thermal expansion found in high-performance environments. Whether you are plumbing a simple oil cooler or a complex multi-pump fuel system, our joiners provide the structural integrity your build demands.

Browse our full range of AN unions and couplers below. In stock and ready for fast dispatch to workshops and enthusiasts across New Zealand.