Fire Truck Center Insights

A fire pump's capacity rating is measured at draft, at 150 psi, through 20 feet of suction hose. At a hydrant, the water main and your supply line set the flow. A light-blue hydrant feeding 500 feet of 5-inch hose can leave a 1,500 gpm pump with about 900 gpm.

To compare two used fire trucks, check mission fit first, then the NFPA edition each was built to, miles and hours, tire age, pump and aerial certification and parts support. Add each truck's year-one costs to its price and divide by the years of service it has left. The cheaper truck often costs more per year.

A dry hydrant is a non-pressurized pipe installed in a pond, lake or stream so a fire engine can draft water at the roadside. Here is what the federal design standard requires, how ISO credits one, and why the truck drafting from it matters as much as the pipe.

Before you travel to see a used fire truck, ask these 13 questions. A used car comes with a federal Buyers Guide and a signed odometer statement; a fire truck comes with neither, because both rules stop at a weight threshold no apparatus meets. Here is what to ask, what a real answer contains, and which answers mean walk away.

The right water tender size is the one that sustains your needed fire flow over a full round trip to water. Tank volume alone is the wrong spec — dump rate, fill rate and haul distance decide what a tanker delivers. Here is the arithmetic, and what to check on a used truck.

A fire truck pump test is the annual check that a pump still makes rated flow at rated pressure from draft. A pump certification is a one-time, independently witnessed test of a new pump. Here is what each document proves, who is allowed to sign it, and what actually fails a pump.

A commercial driver's license applies to most fire trucks by default, because nearly every pumper, aerial and tanker is rated above 26,001 pounds. The firefighter exemption is real but narrow: it belongs to your state, carries four conditions, and usually does not cover driving a truck you just bought home.

Most fire trucks hold 300 to 1,000 gallons, and NFPA set the pumper minimum at 300. Tankers run to 4,000. The more useful number is duration: a 300-gallon tank lasts 90 seconds through a 200 gpm handline, and crews must hold 10 percent back in reserve.

A fire engine carries the pump, tank and hose, and it puts water on the fire. A fire truck carries the aerial ladder and the forcible-entry tools. Neither NFPA nor the federal typing system uses the phrase fire truck, and plenty of aerials carry a bigger pump than the engine parked beside them.