TM 9-2320-209-20-3-2 c. Replacement. FRAME 1 NOTE Put thread tape on all fittings before putting them back. 1. Using 5/8-inch wrench, screw in and tighten three elbows (1) to position noted. 2. Using adjustable wrench, screw in and tighten two tee fittings (2). Using 3/4-inch wrench, screw in and tighten safety valve (3). 3. Using 5/8-inch wrench, screw in and tighten two drain cocks (4). GO TO FRAME 2 13-233