By Alan M. Petrillo
Fire departments around the country, but especially in the West, Southwest, and Midwest, are fitting out small, easy-to-maneuver vehicles with skid units that are useful not only for wildland fires but also in urban interface situations.
Skid Unit Evolution
Jerry Halpin, vice president of sales and marketing for CET Fire Pumps, says that skid units have come a long way in the past 40 years. "Most of the innovation today is found in the pump and its capacity, both in pounds per square inch (psi) and gallons per minute (gpm), and in the application of different agents such as foam and other types of wet water that might not have been available even 15 years ago," he says.
Such units, called both skids and drop-ins, are not terribly large in terms of size or weight, Halpin observes. "They are much more efficient than ever before, can be put on a wider variety of vehicles that only carry a limited amount of weight, and have more firepower and gpm available," he points out.
CET Fire Pumps makes a series of what Halpin calls "quick-delivery skid unit models," from the basic Econo Pac with a pump capacity of 20 gpm at 125 psi and 60-gallon water tank to the Attack Pac, carrying a 20-horsepower midrange fire pump that delivers 265 gpm at 50 psi, 190 gpm at 100 psi, 115 gpm at 150 psi, and 45 gpm at 200 psi. The Attack Pac also has a 200-gallon fully baffled polypropylene water tank. Other CET skid units are the Ready Pac, Skeeter Space Pac, and Ultra Power Pac.
Typically, CET skid units are powered by six-, nine-, 11-, or 20-horsepower (hp) gasoline engines, although diesels are available for some skid unit models. The skids are most often mounted on Ford chassis, Halpin says, from F-150 to F-550 models.
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1 W.S. Darley Company makes the Fast Attack 2 skid unit, available with a variety of Darley pumps and water tank sizes and with the Foam Flurry around-the-pump-foam system. (Photo courtesy of W.S. Darley Company.) |
In using skid units, Halpin notes, the issue continues to be "applying the right amount of water at the right psi." He continues, "And especially in forestry work, it is getting into remote places to create a fire stop where the fire won't be able to burn through or to use a skid unit to extinguish hot spots."
Skid Pumps
Jason Nawrocki, OEM sales manager for Waterous, says his company has been seeing an increase in both inquiries and purchases for pumps being used in skid unit applications on smaller fire apparatus. "There are so many different styles of apparatus in how you fight a fire, particularly a wildland fire, that require a more tactical response with 4x4 vehicles, often with pump-and-roll capability," Nawrocki says. "In many of those cases, the slide-in skid unit is the way to go because it allows the fire department to be more agile and tactical in its response."
Nawrocki says that the increased interest in Waterous pumps for skid units "comes from all around the country but is pretty dense in the western United States and Canada, likely because of the drought."
For skid units, Waterous makes the PB series pumps, with an 18-hp gasoline-powered Briggs & Stratton engine, in both volume and pressure versions. Its diesel series, the E300, is an end-suction 300-gpm-capable pump powered by a Kubota engine.
"Our most popular skid unit is the E500 series, a 24.8-hp Kubota diesel with an electronically controlled throttle," Nawrocki says. "We sell a lot of the high-pressure E501 wildland models in the western United States."