For offloading through the API adapter and coupler.

This gravity drop coupler is designed to use gravity for quick and complete off-loading. Mates with all API RP-1004 bottom loading adapters. This coupler has an aluminum body and nitrile gaskets. Angled down for better drainage.
Unit of Measure


API Coupler Size

N/A 4 in

Coupler Size

N/A 4 in


N/A Aluminum
Maximum Working Pressure1 N/A 100 psi

Gasket Material

N/A Nitrile Butadiene Rubber (NBR)

Mates with

N/A All API RP-1004 bottom loading adapters

Markets Served

N/A Petroleum (Including Fracking)

Industry Standards

N/A ASTM B85 Grade 383

Material Specifications

Material Specifications

  • Aluminum alloy spec ASTM B85 Grade 383.
  • Brass handles.
  • Steel handle pins, pull rings and safety clips are all zinc-plated.
  • Gaskets are nitrile.



N/A All sizes may not be stocked in all locations.
We disclaim any liability for use of our products in applications other than which they are designed.
  • 1 Metal coupling pressures are based on ambient temperature (+70 ºF or +21 ºC) with standard NBR gasket.