TM 55-1930--209-14&P-5 Table 3-2.  Drinking Water System Valves (continued) Figures 1-2 and 1-3 Label Identification Type Callout Location and Valve Function 1-1/4-in gate valve DW13 Void 3 port - in re- RESERVE TANK DRAIN: Allows serve tank drain line drinking water to drain from reserve tank 3-in globe valve DW14 Void 3 port - in pump STERN OR PORT DISCHARGE shore discharge line Allows drinking water to flow to stern shore discharge hose 2 1/2-in globe valve DW15 Weatherdeck - port- PORT OVERBOARD side near stern DISCHARGE: Allows drinking water to be discharged overboard or to vessel tied alongside 1/2-in globe valve DW16 Void 3 port - In RESERVE TANK SUPPLY reserve tank fill line Allows drinking water from pressure set to flow Into reserve tank and isolates tank 1/2-in globe valve DW17 Void 3 port - in PRESSURE SET DISCHARGE dayroom supply line Allows drinking water to flow near pressure set from water pressure set to dayroom and chlorination unit 4-in DW18 Void 3 port - In discharge DISCHARGE PUMP 2 SUPPLY gate valve pump suction Allows pump to drain drinking (Barges 2 and line near pump 2 water from storage tank(s) 3 only) 3-in DW19 Void 3 port - in pump DISCHARGE PUMP TO PORT globe valve overboard discharge OVERBOARD Allows drinking (Barges 2 and line water to flow to port overboard 3 only) discharge valve 3/8-in In void no 2 port To wash down chlorination unit spigot and void no 2 port deck plates Washdown ROWPU space - on each For connection of washdown hose bib of 4 washdown station hoses stations, deckhouse top-2 washdown stations Washdown On washdown For washdown station hose adjustment hose nozzle Drain cock Void 3 port and Sample valve on each storage starboard tank and reserve tank 3-3