Systems
Chris-Craft 3–31
Fresh Water System
The water tank fill deck plate is located on the opposite side of the
fuel fill deck plate. DO NOT put fuel in the water tank or water in the
fuel tank.
The following models have a fresh water tank:
• Launch 22 – Optional Transom Fresh Water Shower
• Lancer 22 – Optional Transom Fresh Water Shower
• Launch 25 – Standard
• Launch 28 – Standard
• Corsair 25 – Standard
• Corsair 28 – Standard
The components of the water system consists of:
• Water Tank
•Pressure Pump
• Water Fill Plate
• Transom Shower
•Piping
A fresh water deck fill is located on the side of the boat and clearly marked WATER. Actual location and
physical appearance of the fill plate may vary from model to model, but it is clearly labeled.
The water pressure pump (Figure 3-26) is a pressure-demand type pump. When energized the pump imme-
diately pressurizes the water system. When the operating pressure is reached the pump shuts off until it
senses a loss of pressure, such as a faucet being opened, at which time it is automatically re-energized.
If the pump cycles on and off without a faucet being opened it may indicate a pressure leak in the system or
excessive air in the system. Bleed the system of air by opening all faucets until only water is flowing from
each. If a leak is present, or suspected, find and repair the leak.
A fresh water filter is attached to the pump and should be replaced seasonally (every 6 to 12 months) or
when taste and/or odor problems return. The pump and filter is located in the engine compartment. Actual
orientation of the pump and filter may vary from model to model.
When air enters the system it becomes necessary to purge it for proper operation. To bleed the system of
air, follow the steps outlined in “Using the Fresh Water System” on page 35.
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