Water Systems
9.3
Always ensure that when filling the fresh water tanks
that you are filling through the fresh water fill. Other
fills or pump outs may visually look the same. Filling
fresh water in to the waste pump out could flood
your boat, or filling the diesel fuel tank could dam-
age your fuel system.
9.2.2 Fresh water sanitation
NOTE: Be sure and read the OEM manuals that are supplied
with your boat, the next section is taken from one of those
manuals.
Sanitizing Potable water systems require periodic main-
tenance to deliver a consistent flow of fresh water.
Depending on use and the environment the system is
subjected to, sanitizing is recommended prior to storing
and before using the water system after a period of stor-
age. Systems with new components, or ones that have
been subjected to contamination, should also be disin-
fected as follows:
NOTE: The sanitizing procedure is in conformance with the
approved procedures of the US Public Health Service.)
1. Use the following methods to determine the amount of
common household bleach needed to sanitize the tank:
A. Multiply “gallons of tank capacity” by 0.13; the result
is the ounces of bleach needed to sanitize the tank (30
gallons X .13 = 3.9 oz bleach).
B. Use the number of liters of tank capacity to determine
the number of milliliters of bleach needed to sanitize
the tank (120 liters of tank capacity = 120 milliliters of
bleach).
2. Mix into solution the proper amount of bleach within a
container of water
3. Pour the solution (water/bleach) into the tank and fill
the tank with potable water.
4. Open all faucets (hot and cold) allowing the water to
run until the distinct odor of chlorine is detected.
5. The standard solution must have four (4) hours of
contact time to disinfect completely. Doubling the solution
concentration allows for contact time of one (1) hour.
6. When the contact time is completed, drain the tank.
Refill with potable water and purge the plumbing of all
sanitizing solution.
9.3 Pumps
On board your boat there are both fresh water and raw
water pumps that control the flow of water to the related
components. These are electrically powered pumps .
Some of the features of these pumps are:
•Smooth Flow
• Self-Priming up to 10 feet (3m)
• Dry running capability
• Soft noise absorbing mounts
• Snap-fit port fittings
• Built-in bypass — less pulsation
• Reduces need for accumulator tank
• Corrosion resistant materials
Remember to read your OEM manuals for complete informa-
tion, as well as safety warnings, or notices.
9.3.1 Fresh Water Pump
The fresh water pump supplies water to the system
under pressure when the potable water supply is not
connected.
The FRESH WATER PUMP breaker switch is on the DC
side of the MDP. When the breaker is switched to ON,
the pumps will run until the hot and cold water systems
are pressurized. An automatic pressure switch shuts the
pumps off until the pressure drops to a preset level (for
example, a pressure drop caused by opening a faucet).
The pumps will then run again until the system is pressur-
ized and turn itself off. The pumps have a build-in check
valve to prevent backflow through the pumps.
Fig 9.3
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