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 TM 55-1905-219-14-1
FRESH WATER SYSTEM PIPING.
a. The Fresh Water System (Figure FO-22) consists of a fresh water storage tank, pressure system, and an
electric water heater. A 3/4 inch hose valve for fresh water service is located on the inboard side of the deckhouse at
Frame 46.
b. The Fresh Water tank is located below decks on the centerline between Frames 40 and 44. Water from the
tank is piped by the pressure system to the shower, lavatory, sink, clothes washer, drinking fountain, water heater and to
the fresh water hose connections in the engine room. The tank is filled through a fill pipe and hose connection provided
above the vehicle deck on the outboard port side at Frame 44-1/2. Fill hose stowage is located at Frame 40 inboard port
bulwark. A tank vent is provided in the vehicle deck inside the deckhouse at Frame 41-1/2. The fresh water tank has a
capacity of 4166.6 gallons (15766.4 1).
c. The Tank Suction Valve is provided in the bottom of the tank. It is located just forward of Frame 44, 2 feet
(0.61 m) to port of centerline. A Y-strainer is also installed in this line. The height of water in the tank can be determined
by reading the tank level indicating gauge in the engine access room; It can also be determined by opening the petcocks
that are located at various heights on the aft side of the tank. A 1-inch suction pipe has been extended from the suction
valve on the bottom of the tank, aft and outboard to port under the floor plates to the pressure system.
d. The Pressure System consists of an electric-driven pump unit, a pressure tank with sight gauge, a pressure
switch for automatic control of the system, automatic air volume controls, hand air charging pump, and a Naval 50 gallon
electric water heater. The pressure system is located below decks at Frame 49. Drains and relief valves are provided on
the pressure system and hot water tank. A temperature gauge is also provided for the hot water tank. The pressure
system has a designed pressure of 45 psi (3163.8 gm sq cm). The relief valve setting on the pressure tank is 50 psi
(3515.4 gm sq cm). The relief valve on the hot water tank is set for 55 psi (3866.9 gm sq cm).
Change 3 1-107
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