TM 9-2320-361-20 15-62 TM 9-2320-361-34 15-13. SUMP VALVE, DRAIN VALVES, AND DRAIN TUBES MAINTENANCE (M49A2C) (Contd) g. Sump Valve Installation 1. Install support (16) on cabinet (13) with two screws (12) and new locknuts (14). 2. 3. 4. 5. 6. Place sump valve (5) on support (16) with drain tubes (8) and (9) through two holes in cabinet floor (10). Install sump valve (5) on support (16) with two screws (11). Do not tighten two screws (11). Position pad (4) around sump valve (5). Install bracket (2) on cabinet (13) against pad (4) with two screws (1) and new locknuts (15). Install collar (7) around pad (4) and on bracket (2) with two screws (3) and new locknuts (6). 7. Tighten two screws (11).