(11)
 Stop the pump on the toilet service cart.

 S 683-032

 (12)
 Pull the handle for the drain valve down and turn it to lock the drain valve open.

 S 683-033

 (13)
 Drain the toilet tanks fully.

 S 613-034

 (14)
 Unlock and release the handle for the drain valve to close the drain valve.

 NOTE: Let the handle for the drain valve move quickly into the
____ closed position. This makes a water tight seal at the drain valve.
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 S 093-035
 (15) Do these steps to disconnect the toilet service cart:
 (a)  Do these steps to close the flapper valve in the waste-tank
 drain line:
 1)  Turn the CLOSE lever in the direction of the CLOSED arrow
 and hold the CLOSED lever in the closed position.
 2)  Turn the OPEN lever in the opposite direction of the OPEN
 arrow to lock the flapper valve in the closed position.
 (b)  For the drain cap with the push-to-open lever for the flapper
 valve, close and lock the drain cap.
 NOTE:____ The flapper valve will move to the closed position at
 the same time the drain cap is moved to the closed
 position.
 (c)  Disconnect the flush line.
 (d)  Disconnect the waste drain hose.

 S 493-051
 (16)
 Connect the chemical tank on the toilet service cart to the rinse/fill connection.

 S 613-052

 (17)
 Put a minimum of 2 gallons (or the quantity shown on the service panel door placard) of water and toilet flushing deodorant into each toilet tank.

 NOTE: The minimum required amount of precharge necessary to
____ enable proper toilet pump operation is at least 2 gallons of precharge. Because of ramp slope variations and servicing equipment tolerances, Boeing recommends that 3 gallons of precharge be used to ensure that an adequate amount has been supplied and to improve deodorization. The minimum quantity can be used if maximum waste capacity is desired.
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 NOTE: If the airplane is going to freeze, antifreeze may be needed
____ in the toilet tanks. For recommended antifreezes, see this procedure: COLD WEATHER MAINTENANCE - SERVICING (AMM 12-33-01/301).
 S 093-055
 (18) Disconnect the flush line.
 NOTE:  Make sure the flush line is fully drained when you disconnect the toilet precharge connection.
 S 163-056
 (19)
 Clean and dry all the components and the door of the toilet service panel.

 S 213-070

 (20)
 Make sure that the rinse/fill connection has no leakage.

 S 413-068

 (21)
 FLUSH PORTS WITH A CAP; Close the cap on the flush port.

 S 213-057

 (22)
 Make sure the seal in the cap for the waste-tank drain connection is in good condition. Look for aging, cuts, wear, or other signs of deterioration.

 S 213-058

 (23)
 Make sure the end of the waste-tank drain connection does not have nicks, dents, scratches, or cracks.

 S 213-071

 (24)
 Make sure that the waste-tank drain connection has no leakage.

 (25)
 Close the cap on the waste-tank drain connection.

 (26)
 Close the door for the toilet service panel.

 (27)
 Remove electrical power if it is not necessary (Ref 24-22-00).

 S 413-059
 S 413-060
 S 863-061
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