TM 55-1930-209-14&P-1 Table 14-3.  Drinking Water System Valves Label Identification (continued) Figures 14-2 & 14-3 Label Identification Type Callout Location and Valve Function 4-in ball DW12 Void 3 port - in DISCHARGE PUMP 1 SUPPLY: valve (3-way) discharge pump Allows pump to drain drinking suction line near water from storage tank(s) pump 1 1-1/4-in DW13 Void 3 port - in re- RESERVE TANK DRAIN: Allows gate valve serve tank drain line drinking water to drain from reserve tank 3-in DW14 Void 3 port - in pump STERN OR PORT DISCHARGE: globe valve shore discharge line Allows drinking water to flow to stem shore discharge hose 2 1/2-in DW15 Weatherdeck - port- PORT OVERBOARD globe valve side near stem DISCHARGE: Allows drinking water to be discharged overboard or to vessel tied alongside 1/2-in DW16 Void 3 port - in RESERVE TANK SUPPLY: globe valve reserve tank fill line Allows drinking water from pressure set to flow into reserve tank and isolates tank 1/2-in DW17 Void 3 port - in PRESSURE SET DISCHARGE: globe valve 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 14-17