TM 1-1510-218-10 2-132 CAUTION During freezing temperature, toilet shall be serviced with antifreeze solution to prevent damage. Charge  the  tank  with  a  mixture  of  2  quarts  of water and 3 ounces of Monogram DG-19 chemical. NOTE To assure toilet recirculation system operation    during    freezing    weather,    an ethylene glycol base anti-freeze containing antifoam  agent  may  be  added  to  the  flush fluid. d.  Tank Installation. 1.   Reinstall  the  tank  by  inserting  the  slides, located  on  each  side  of  the  knife  valve, into    the    slide    plate    assembly    on    the bottom   of   the   toilet   and   slide   tank   into place. 2.   Press  the  two  fasteners  to  the  first  detent to secure the tank. 3.   Remove  the  cap  in  the  flush  hose  quick disconnect and connect the hose coupling to     the     quick     disconnect.          Lock     the disconnect lock ring. 4.   Pull  the  knife  valve  actuator  to  fully  open the valve. 5.   Lift  the  toilet  seat  and  shroud  assembly from  the  top  of  the  toilet  and  wipe  with cloth    moistened    with    clear    water    and disinfectant. Wipe the bowl and surrounding area. 6.   Check flushing operation of the toilet and check for leaks. 7.   Close access to the toilet. 2-110.  SERVICING    THE    CHEMICAL    TOILET    T AIRCRAFT SERIAL 86-60084-86-0089. The  toilet  is  of  the  standard  dry  chemical  type.   The  toilet  should  be  removed  and  emptied  after  each flight,  if  used.    An  approved  dry  chemical,  such  as Commode Magic, may be used in accordance with the manufacturer's instructions.  A stiff (nonmetallic) bristle brush  and  a  water  and  detergent  solution  should  be used  to  clean  the  bowl.    Install  a  clean  waste  bag  in the bowl before adding chemical. 2-111.  ANTI-ICING,   DEICING    AND    DEFROSTING PROTECTION. The  aircraft  is  protected  in  subfreezing  weather by spraying the surfaces (to be covered with protective covers)  with  defrosting  fluid.   Spraying  defrosting fluid on aircraft surfaces before installing protective covers will   permit   protective   covers   to   be   removed   with   a minimum  of  sticking.     To  prevent  freezing  rain  and snow    from    blowing    under    protective    covers    and diluting   the   fluid,   ensure   that   protective  covers  are fitted  tightly.    As  a  deicing  measure,  keep  exposed aircraft   surface   wet   with   fluid   for   protection   against frost. NOTE Do     not     apply     anti-icing,     deicing     and defrosting fluid to exposed aircraft surfaces   if   snow   is   expected.      Melting snow   will   dilute   the   defrosting   fluid   and form  a  slush  mixture,  which  will  freeze  in place and become difficult to remove. 2-112.  ANTI-ICING,   DEICING,   AND   DEFROSTING TREATMENT. Use  undiluted  anti-icing,  deicing  and  defrosting fluid   (MIL-A-8243    or    MIL-F-5566)    to    treat    aircraft surfaces  for  protection  against  freezing  rain  and  frost.   Spray   aircraft   surface   sufficiently   to   wet   area,   but without     excessive     drainage.          A     fine     spray     is recommended to prevent waste.   Use diluted, hot fluid to remove ice accumulations. 1.   Remove   frost  or  ice  accumulations  from aircraft  surfaces  by  spraying  with  diluted anti-icing,    deicing,    and    defrosting    fluid mixed in accordance with Table 2-16. 2.   Spray  diluted,  hot  fluid  in  a  solid  stream (not over 15 gallons per minute).   Thoroughly  saturate  aircraft    surface  and remove    loose    ice.        Keep    a    sufficient quantity   of   diluted,   hot   fluid   on   aircraft surface  coated  with  ice  to  prevent  liquid layer   from   freezing.      Diluted,   hot   fluid should be sprayed at a high pressure, but not exceeding 300 psi. 3.   When facilities for heating are not available  and  it  is  deemed  necessary  to remove   ice   accumulations   from   aircraft surfaces, undiluted defrosting fluid may be used.    Spray  undiluted  defrosting  fluid  at 15-minute   intervals   to   assure   complete coverage.    Removal of ice accumulations using undiluted defrosting fluid is expensive and slow.