TM 10-5430-243-12&P 0019 00 Change 1 0019 00-6 Table 1.  Unit Preventive Maintenance Checks and Services For 20,000 and 50,000 Gallon Collapsible Water Storage Tanks (continued). ITEM NO. INTERVAL MAN- HOUR ITEM TO BE CHECKED OR SERVICED PROCEDURE EQUIPMENT NOT READY/ AVAILABLE IF: 14 After Filler/Discharge Gate Valve (2) or   Ball Valve (3) Check for bent or binding stem, broken hand-wheel or handle. Stem, hand- wheel or handle are damaged or missing. 15 After Drain Ball Valve (4) Check for bent or binding stem, or broken handle. Stem or handle are damaged or missing. 16 After Vent Fitting   Assembly (5) Check for evidence of leakage, damage, or missing parts.  Check the vent cap for cleanliness and freedom of operation.  Check if the vent cap gasket, flat rubber gasket, or cam- lever arms are damaged or missing. Any evidence of leakage.  Vent cap is damaged or missing.   Vent cap gasket, flat rubber gasket, or cam-lever arms are damaged or missing. 17 After Filler/Discharge Assembly (6) (GTA Container Model) or Filler/Discharge Assembly (7) (Reliance and MPC Models) Check for evidence of damage or leakage.   Check if cam-lever arms are damaged or missing. Check if the elbow body is cracked or sealing surface is badly dented. Check for loose, damaged or missing screws and gaskets. Any evidence of leakage.  Cam- lever arms damaged or missing.  Elbow body cracked or worn. 18 Quarterly Tank (1) Inspect for cuts, punctures and leaks. Loose or missing bolts where fittings connect to tank. Tank is cut, punctured or leaks.  Loose or missing fitting bolts. 19 Quarterly Filler/Discharge   Gate Valve (2) or   Ball Valve (3) Check for proper operation and leakage. Check for bent, broken, or binding parts.  Check for leakage. Valve will not open/close.   Component parts are missing or damaged.   Valve leaks or is damaged.