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Training Exercise - Using Large Diameter Hose - GFD - 10/02/2007


Large Diameter Hose Training at New Hingham

CHESTERFIELD - Fire departments from Chesterfield and Goshen conducted a joint training exercise on the use of large diameter hose at the New Hingham Regional Elementary School in Chesterfield on Tuesday, October 2nd.  Goshen Training Officer Rick Clark led the group through a discussion of the physical characteristics of the hose along with its practical application (see photo below).

Goshen Deputy Chief and Training Officer Rick Clark going over the drill


  • Standard length is 100' (other sizes available)
  • External jacket is usually made of polyester fiber.  Internal liner is made of seamless coated rubber
  • Coupled weight of a 100' length of 4" hose is 78 pounds
  • Coil size of a 100' length of 4" hose is 23"
  • A 100' length of 4" hose when filled with water weighs 620 pounds and holds 65 gallons
  • Pressure rating: 185 psi for supply hose


  • Lay hose on the same side of the street as the water supply
  • Cross the road at the fire scene (if necessary) and lay at an angle
  • Never drive on or cross dry hose
  • Fire apparatus can cross a charged 4" hose line.  Cross at an angle, one tire at a time and never with chains or studs on the tires.
  • Passenger cars or small trucks can NEVER cross a charged 4" hose line.  They'll end up pushing it down the roadway.
  • Lay 4" hose line at 10-15 m.p.h. to prevent the couplings from hitting the tailgate of the engine
  • Use the 5 second rule (1000 1, 1000 2, 1000 3, 1000 4, 1000 5) when opening and closing valves
  • Open line to bleed air from line

The Goshen Fire Department took the opportunity to test out it's recently acquired "Z" valve.  Water from the fire pond at the New Hingham School was pumped several hundred feet uphill through the parking lot to the front of the school and into the "Z" valve.  The valve channeled the water into Goshen's E-1 pumper then out the discharge valve and back to the Z valve eventually making it's way to Chesterfield's pumper which was stationed in the driveway near the pre-school wing of the building.  As you can see from the statistics above, water in large diameter hoses is heavy.  The whole purpose of this valve is to boost the water pressure within the hose line during incidents where water needs to travel long distances between the source and a fire.  The photo  below graphically depicts the direction of the water flow.

'Z' Valve Illustrated

CFD FF Bill Nugent and CFD FF Mike Welch

Bill Nugent (left) and Mike Welch (right) of the Chesterfield Fire Department, operate the pump panel of Chesterfield's E1 attack engine.

Chesterfield's 53-E1

A rainbow forms out of the mist from Chesterfield's top mounted deck gun.  In the event of an actual fire in either town, standard operating procedures call for mutual aid from surrounding communities to assist in extinguisment.  This drill allowed the departments to practice flowing large quantities of water over a long distance.

CFD FF Drew Morse

Chesterfield Firefighter Drew Morse is silhouetted against a scene light on Chesterfield's new engine in this time exposure.  What appear to be scratches in the photo are actually droplets of mist from the deck gun that are swirling around him during the training exercise.

Former Chesterfield Chief Winnie Bancroft and Goshen Deputy Chief Rick Clark

Former Chesterfield Chief Winnie Bancroft and Goshen Deputy Chief Rick Clark take a moment after the drill to share stories and a few laughs.

(Tuesday, October 2, 2007)