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What do fire truck pump valves control?

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They control the flow and direction of water. Most fire trucks have some sort of on board water tank and also quite often the ability to hook up to municipal water supplies such as a fire hydrant or receive water from other units or a static water source (such as a pond). read more

The valves on a fire truck control that supply water and divert it to the appropriate piping exit, whether that be hand lines (fire hose), fire monitors (master stream appliances) or ground sweep devices. read more

So the first valve that's usually operated is called, quite appropriately, the"pump to tank" valve. When open, it lets water flow from the onboard tank, into the pump. Once water is available to the pump, it has to be routed to one or more discharges. read more

When arriving at a fire scene, the driver will jump out and climb to the top of the truck to begin pump operation. An indicator -- a series of red lights on the pump panel -- lets the operator know how much water is left in the tank. The first thing the pump operator is going to do is make sure that the valve between the tank and pump is open. read more

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