Hose coupling

The hose coupling is the metal piece on the end of a hose to connect it to extra hose or hose appliances. It is usually made of steel, brass, stainless steel or aluminum.

Hose couplings come in many different styles:

Storz coupling

Storz connection on a standpipe.

A "quarter turn coupling", or "sexless coupling", commonly used to connect to fire hydrants, easy to connect, no particular male or female end, locks are on inside of coupling. The standard coupling on Fire Hose in GERMANY.

See Storz.

Nakajima coupling

Another "quarter turn" or "sexless" coupling, similar to Storz coupling, but not used as often. Main difference between these and Storz are that this has locks on the outside.

Machino Coupling

A quick connect and disconnect coupling used on Fire Hose in JAPAN. --CouplingMaster (talk) 17:43, 31 May 2009 (UTC)

NST Coupling

Side view of a 1.5 inch to 2.5 inch adapter.

National Standard Thread(NST), also known as National Hose thread (NH). The most common type of fire hose coupling used in the USA. The male and female straight (non-tapered) threads screw together and the connection is sealed with a gasket.

Expansion Ring Fire Hose Coupling (see Red Head)

Commonly used on lay flay Fire Hose, it has the advantage of providing not flow restriction, as the expansion ring is expanded to match the I.D. (Inside Diameter) of the hose. They are installed with special machinery using a Drawbar Expander. In the USA it is most commonly supplied with NST (NH) threads. --CouplingMaster (talk) 17:43, 31 May 2009 (UTC)

Guillemin symmetrical clutch

The Guillemin symmetrical clutch is widely used in France. It is the coupling used by the french firefighters.

It can be fastened by hand, but it is also possible to use a tricoise wrench. It is also "quarter turn" and "sexless" (symmetrical).

Each end has a ring with two protuberances outside; when the ring turns, the protuberances lock to the hook of the other hose.

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Barcelona coupling

It is the coupling used by the Spanish firefighters. It is the obligatory system in Spain for firefighting.

The male and female threads screw together.

Mulconroy/Holedall Swaged Hose Coupling (see Dixon Valve)

Commonly found on larger diameter hoses used in higher pressure applications or where the hose is exposed to higher end pull. (i.e, OS&D (Oil Suction & Discharge) hose) They are installed with special Hydraulic Ram machinery and special dies. --CouplingMaster (talk) 17:43, 31 May 2009 (UTC)

Holedall IX Internally Expanded (Internally Swaged) Hose Coupling (see Dixon Valve)

Used in higher pressure applications, or where the hose is exposed to higher end pull, or where a full flow is required. They are installed with special Hydraulic Pull Bar machinery using special pull plugs. --CouplingMaster (talk) 17:43, 31 May 2009 (UTC)

Holedall (Scovill/Rostra) Internally Expanded Hose Coupling (see Dixon Valve)

Used primarily on fuel oil hose applications, where a full flow is required. They are installed with special Hydraulic Pull Bar machinery using special pull plugs.--CouplingMaster (talk) 17:54, 31 May 2009 (UTC)