OPW 1004D4 API Bottom Loading Coupler


Call 800-876-2826 for current pricing.

The 1004D4 is the next generation in API Bottom Loading Couplers from OPW. By combining ease of maintenance with a unique spring loaded sleeve design, the D4 provides the ultimate coupler experience.


5 Cam Design

      • Ensures easy alignment; tight connection to adaptor & resists side forces while loading

Fully Interlocked

    • Dual interlocks ensure that the D4 cannot be opened unless it is properly connected to an API Adaptor


Superior Sealing

      • Simple and reliable smart-seal design consisting of dual high-performance O-rings

High-Performance Seals

    • Special Fluorocarbon Seal Compound provides compatibility across most products including gasoline, diesel, biodiesel and ethanol.*



      • All pins and small threads have been eliminated to provide quick, easy access to all critical components
      • Nose seal can be replaced easily without having to remove coupler from rack
      • No special tools required
      • Can be completely rebuilt in minutes

Spring-Loaded Sleeve

      • Unique sleeve design automatically “jumps” onto API truck adaptor.


    • New stainless steel ‘ergo’ handle design provides easy, smooth operation.

*Other seals available upon request.