Internal Expansion Hose Couplings Offer Full Flow Internally Expansion Couplings allow full flow through a hose assembly, decreasing restriction & build-up of material around the coupling shank. A strong permanent connection to the hose, expansion couplings are ideally suited for thick materials such as slurries, mud, hot tar, plaster, and concrete.

This coupling type can handle higher working pressures and offer longer service life than many other coupling styles. Internally Expanded couplings are not field repairable and require special equipment for installation. The Coupling body is pressed from the inside out, trapping the hose between the ferrule and the expanded hose stem. Each hose coupling has a lip around it that matches with the top of the ferrule to lock the coupling into place. Standard expansion products include Male NPT hose end, Grooved hose end, and California Raised (HD style) hose end.

Please contact us to discuss whether Internal Expansion Couplings are right for your application

Available in Galvanized and Stainless Steel

Brass Scovill Style male NPT, female NPSH, and grooved ends for curb-pump and fuel service are available

Also see: Industrial Crimp Couplings


WARNING: Cancer and reproductive harm. Visit for additional information.
  • Per Section 1417 of the Safe Drinking Water Act (SDWA) use Lead free parts in all consumable water applications.  Lead free refers to the wetted surface of pipes, fittings and fixtures in potable water systems that have a weighted average lead content = 0.25%. Source: California Health & Safety Code (116875). Vermont Act 193*171NLF
    Please contact us for a limited assortment of lead-free products