TM 5-4220-231-14&P 5-9.    Flask  Valve  (DASS).     See   Figure 5-8. This   task    covers: Repair INITIAL   SETUP Tools Equipment Condition General Mechanics Tool    Kit Remove Flask    Valve    (Para. 4-21) O-ring     Installation and    Removal Tool Materials/Parts Reference Bags,    Plastic (Item   6,  Appendix D) Para. 3-13    Maintenance and    Reentry Control Procedures Valve, Flask    13229E4605 Seat     Assembly, 2541-45 Stem, 2541-35 Packing, 2541-8 0-ring,     2541-18 (1) Follower     (spacer), 2541-17 Grease, Halocarbon (Item    13,   Appendix D) Isopropyl Alcohol    (Item    1  or  2,  Appendix D) Rags, clean, lint-free    (Item    15,   Appendix D) Silicone Compound (Item   9,  Appendix D) Water,     Distilled     (Item    10,  Appendix D) Nonionic Detergent Solution     (NID)   GP (Item    17,   Appendix D) WARNING Inspect all  seating, sliding     metal     surfaces, and    threads for   damage that might   cause leaks    or  faulty    operation. Replace any   defective items. NOTE Perform     in  a  clean environment. NOTE Clean     metal    parts    with   nonionic detergent solution (NID)   (Item    17, Appendix D).Wipe    with   clean rags    (Item    15,  Appendix D)  to  get desired level   of  cleanliness. NOTE Clean     non-metal parts     with  clean rags    (Item    15,   Appendix D),  or  use isopro-pyl     alcohol     (Item    1  or  2,   Appendix D)  followed     by  a   thorough rinse    in  clean     water     (Item    10,   Appendix D).  Any   other    solvents may cause damage to   parts. Change 1 5-35