TM 10-6640-215-13 4-37.  REMOVE/INSTALL COMPONENTS OF VACUUM SYSTEM - continued. INSTALLATION 1. Install Vacuum Pump.  See figure 4-27. a. Install conduit on vacuum pump motor. b. Position vacuum pump mounted to foundation on mechanical room wall foundation. Secure with bolts, flat washers, lockwashers, and nuts. c. Connect drain line to vacuum pump.  Secure with hose clamp. d. Connect suction hose to vacuum pump.  Secure with hose clamps. e. Connect discharge line at discharge valve. f. Electrically connect vacuum pump at controller box and remove tags. g. Replace controller box cover. 2. Install Flow Control Devices.  See figure 4-25. a. Replace teflon tape on male fittings.  Be sure to wrap teflon tape in same direction of pipe thread. b. Install stopcock valves by screwing valves into vacuum system piping tees or elbows. 3. Replace System Piping.  See figure 4-26. a. Apply teflon tape on male fittings.  Be sure to wrap teflon tape in same direction of pipe thread. b. Connect pipe nipple to elbow or coupling or valve. c. Connect union. TEST 1. Test Vacuum System. Test vacuum system in accordance with procedures listed in paragraph 2-8d. 4-90