TM 10-5430-243-12&P 0004 00 Change 1 0004 00-2 Table 1.  Major Components, Controls and Indicators. Key Component, Control, or Indicator Function 1 2 3 4 5 6 7 8 9 Filler/Discharge Assemblies   Vent Fitting Assembly Drain Fitting Assemblies Drain Hose Assembly Drain Ball/Gate Valve (2-inch) Filler/Discharge Ball/Gate Valve (4-inch) Tank Handles Tank (Water) Ground Cloth Repair Kit (Not Shown) Provides the means to both fill and remove water from the tank.  Allows a hose assembly to be connected to the tank.   Directs the flow of water through the hose assembly into the tank when filling, and out of the tank when discharging.   Can be accessed by removing the dust cap.  Located in two places on top of the tank at diametrically opposite ends. Contains a mushroom type vent cap that is calibrated to open when the tank is subjected to an internal vapor pressure greater than 3 inches (7.62 cm) of water.  Vent cap is connected at the top of the vent pipe.  Located in middle of the tank. Allows the drain hose assembly to be connected directly to the tank.  A drain fitting assembly is mounted on the underside of the tank at each end of the tank.  When the drain plug is removed, the drain hose assembly can be installed. Allows water to drain from the water tank.  Hose assembly is comprised of an 8-foot section of hose attached to a hand operated ball valve.  The hose is connected to the tank drain fitting during installation. Allows water to drain from the collapsible storage tank.  The valve is normally closed when the tank is not being drained or replaced. Allows water to flow to and from the tank assembly.  The valve is normally closed when the tank is not being filled or water is not being discharged from the tank. Provides attachment points used to lift, move or position the empty water tank and the ground cloth, if equipped. Collapsible elastomeric-coated fabric water storage tank in 20,000 and 50,000 gallon capacities.  Used for storage and containment of potable drinking water. The ground cloth, if equipped, is spread out to protect the bottom of the tank from abrasion and wear resulting from contact with the ground. The repair kit contains all items needed to perform temporary repairs of cuts and punctures to the tank fabric.