Collection: Maclock & Envirolock

Maclock and Envirolock are specialist quick disconnect couplings developed for industrial utility hose systems where reliability, durability and operational safety are essential. Manufactured from corrosion-resistant stainless steel, both systems provide fast, secure hose connections while withstanding demanding industrial environments.

Maclock couplings are designed as an interchangeable quick disconnect system, allowing compatibility with Macdonald and N-Series couplings. Their simple push-and-twist locking mechanism enables rapid hose connection while maintaining full flow for compressed air, inert gas, water and other utility services.

Envirolock couplings use a non-interchangeable quick disconnect design, preventing hoses carrying different media from being accidentally connected together. Combined with a colour-coded sleeve system, Envirolock helps reduce the risk of cross-contamination and improves safety where multiple utility services operate within the same facility.

Both coupling systems are widely used where dependable performance, ease of use and long service life are essential.

Our range includes a variety of quick disconnect fittings and accessories to suit industrial utility hose systems.

• Maclock Quick Disconnect Couplings – Interchangeable couplings compatible with Macdonald and N-Series systems.
• Envirolock Quick Disconnect Couplings – Non-interchangeable couplings designed to eliminate incorrect hose connections.
• Threaded Adaptors – BSP threaded fittings for connecting pumps, valves and process equipment.
• Hose Tail Fittings – Securely connect flexible hoses to utility systems.
• Replacement Components & Accessories – Maintain reliable performance and extend the life of your coupling system.

Manufactured from premium stainless steel, our Maclock and Envirolock fittings provide excellent corrosion resistance, durability and reliable performance in demanding industrial environments.

Maclock and Envirolock quick disconnect couplings are trusted across industries where secure utility hose connections and operational safety are critical.

Common applications include:

• Oil & Gas
• Petrochemical Processing
• Chemical Manufacturing
• Power Generation
• Industrial Manufacturing
• Engineering Facilities
• Utilities & Process Plants
• Maintenance & Shutdown Operations

Maclock or Envirolock – Which Is Right for Your Application?

Both coupling systems provide reliable quick disconnect hose connections, but they are designed for different operational requirements.

Maclock is the preferred choice when an interchangeable coupling system is required, allowing compatibility with existing Macdonald and N-Series couplings while providing fast, efficient utility hose connections.

Envirolock is designed for applications where preventing cross-connections is essential. Its non-interchangeable design and colour-coded identification system help improve safety by ensuring different utility services cannot be connected incorrectly.

If you're unsure which system is most suitable for your application, our technical team can help you select the right Maclock or Envirolock coupling based on your utility service and operational requirements.

Selecting the correct quick disconnect coupling helps ensure safe, efficient and reliable operation.

When choosing between Maclock and Envirolock, consider:

• Whether an interchangeable or non-interchangeable coupling system is required.
• The utility service being connected, including compressed air, inert gas or water.
• Hose size and thread connection requirements.
• Pressure and operating conditions.
• Environmental factors, including corrosion resistance.
• Compatibility with your existing utility hose system.

Choosing the correct quick disconnect fitting helps improve operational efficiency, reduce downtime and maintain safe, dependable utility hose connections throughout your facility.