TM 10-6640-215-13 4-38.  REMOVE/INSTALL MANOMETER AIR REGULATOR VALVE. This task covers: a.   Removal b.   Installation INITIAL SET-UP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) Material/Parts Required Teflon Tape, (Appendix E, Section II, Item 157) REMOVAL Remove Manometer Air Regulator Valve.  See figure 4-28. a. Close air discharge valve on air tank. b. Close air supply valve to manometer. c. Open air valve and purge air from air lines. d. Remove air regulator located below the still, disconnect at air line couplings on both sides of the regulator valve. e. Remove defective valve with air lines unions attached and remove unions and retain for reuse. INSTALLATION Install Manometer Air Regulator Valve.  See figure 4-28. a. Install new air regulator and connect air line couplings. b. Close air valve and open air supply valve to manometer. c. Open air discharge valve on air tank. d. Verify proper operation of equipment. 4-91