4-18. PUMP, PIPING, AND VALVES - Continued
4-18.2 Water Piping.
This task covers
Tool Kit, Master Mechanic,
14, Appendix E Gasket Eliminator
22, Appendix E Pipe Sealant
29, Appendix E Threadlock Liquid
Water Tank Drained (see para. 2-13)
PERSONNEL REQUIRED - 2
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
All Piping Drained
Heat Shields Removed (see para. 4-11)
This section does not cover replacement of:
a. Automatic Tank Fill - Rear (Item #49)
b. Hose Reel Hose (Item #24)
c. Tank Fill Hose (Item #30)
Report to Direct Support Level for replacement or repair of these Items.
(1) Replace damaged suction piping, hoses or valves using the illustration and legend as a guide.
(2) Replacement procedures for the different components are covered in the paragraphs listed below.
(3) Apply pipe sealant (item 22, Appendix E) to all pipe threads prior to installation. When connecting
pump suction use gasket elimination (item 14, Appendix E) prior to installation. Coat all fastener threads
on flanges with threadlock liquid (item 29, Appendix E) prior to installation.
a. Victaulic Coupling (see para. 4-18.3).
b. 2 1/2" Drop-out Valve (see para. 4-18.4).
c. Water Tank Valve (see para. 4-18.5).
d. Tank Drain Valve (see para. 4-18.6).