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API Liquid Coupler – Aluminium

API Liquid Couplers

The API Liquid Coupler or otherwise known as the Model C – 3659 are designed for bottom loading hydrocarbon road tankers. The design and manufacturing is done in accordance with API RP1004. This is an industry standard design which allows it to connect to a tank trucks mating API male adaptor. The female API Couple is a standard which is used on a variety of our bottom loading arms.

This coupler is operated by a manual valve which can be opened by turning the handle by 180° degrees. Full flow will be achieved when the coupler is connected with the tank truck and safety lugs are engaged. The API liquid coupler is of robust construction with it being manufactured in aluminium with an anodised surface finish. It’s design means its durable and easy to maintain.

For more designs, please head to our Coupling page where you can find a range of Manntek, engineered and API couplings.

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Available Sizes:





Up to 10 Bar G


Hydrocarbons / Fuels


TTMA flanged


Viton® / Special Viton®

Alternative designs and specifications for the API Liquid Couplers

are available on request