Our Gravity Couplers are used in the unloading process to connect the 4″ API adaptor to 3″ or 4″ hose connections. They mate with 4″ API RP-1004 tank truck adaptors.
The Gravity Couplers come standard with aluminum bodies and Nitrile seals and hose connections which angle 15° downward for better drainage. If you want safer, faster unloads, you will want ours.. Available in Hardened Type for Lower Price