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Large Diameter Hose


All Marin County Fire Agencies are using large diameter supply hose. There is a variety of sizes and coupling styles. The Department has a number of adapters to ensure compatibility with other hose sizes and couplings.

You will also find that some agencies are using appliances at their hydrant connection, either a 4-way valve or Siamese, and some connect directly to the hydrant.

The following list describes the hose and couplings used in the Marin County Fire Service.

5 inch hose with 5 inch Storz (1/4 turn) couplings



5 inch hose with 4.5 NST couplings

Skywalker Ranch


4.5 inch hose with 4.5 inch NST couplings

Corte Madera Larkspur Kentfield Marin County Mill Valley Ross

Southern Marin Tiburon


4 inch hose with 3.5 inch NST couplings

Marinwood Ross Valley San Rafael

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