Four winns Vista 328 Owner's Manual page 75

3. Turn the switch off.
4. Turn the discharge valve handle to the closed posi-
tion, and secure it. The thru-hull valve must be closed
to prevent water from being forced back into the sys-
tem.
Discharging waste overboard is illegal in most
U.S. waters today. Discharge is limited to cer-
tain coastal waters, a designated distance off-
shore. Check with your local boating regulations
before proceeding with any discharge activities.
Some local regulations require overboard dis-
charge systems be physically secured in a closed
position during use of the boat in waters designat-
ed as “no discharge” areas. Check with local
boating regulations. Refer to the manufacturer’s
literature for additional information.
Waste can be removed from the holding tank by taking
the boat to a dockside waste pumping station. Most marina
fueling facilities provide such services.
To pump out the holding tank:
1. Be sure the head has some water in the bowl.
2. Connect the dockside pump out connection to the
WASTE plate located on the deck. Usually the
dockside pump out connection will screw into the waste
deck plate or has a rubber sleeve that inserts into the
plate and must be held in position during the pump
out operation.
3. Have the pumping station operator activate the pump-
ing equipment. The waste will be drawn from the hold-
ing tank and into the pumping station’s disposal tank.
4. Remove the pump out connection from the deck plate.
Add at least 5 gallons of clean water to the holding
tank through the waste deck fitting using a dockside
water hose.
5. Repeat steps 2 & 3 above to pump out the water used
in 4 to flush the holding tank.
6. Add waste holding tank treatment chemical to the
head bowl. It is available from the dockside pumping
station or can be obtained from your dealer. Flush at
least twice.
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09/00
Be careful when handling and storing treatment
chemicals. Not only are they toxic, but they
will also stain and damage surrounding surface.
Information supplied with water and waste system compo-
nents by the equipment manufacturers is included with
this manual. Refer to this literature for additional opera-
tion and service information.
Be sure the batteries in the boat are properly charged.
Operating the pressure pump from a battery with a low
charge will result in pump cycling. This could lead to
premature pump failure.
The decomposition of waste produces a color-
less, odorless gas, methane, that is lighter than
air, combustible, and extremely lethal. Always
provide sufficient ventilation when effecting re-
pairs to the waste system and allow no odor
from the waste system to go unresolved.
Periodically, inspect the water tank vents and thru-hull
vent fittings for any dirt, wax, etc. Carefully remove any
obstruction with a pipe cleaner or similar device.
vent cap is not removable.
Failure to keep the water tank vent fittings clean
will cause excessive pressure buildup within the
tank during filling. This can cause water tank
damage.
Periodically remove the filter screens from the faucet dis-
charge spouts and shower head. Remove the accumula-
tion of sediment from the screens. If necessary, clean
out the holes using a fine wire. A buildup of debris in the
faucet filter screens can create enough restriction to cause
the pump to cycle on and off.
Check the in-line water filter/screen for sediment and
blockage. It is located between the water tank and the
pressure water pump. If obstructed, remove from the
water line and either clean or replace the part. The filter
unit will twist apart.
. The stainless steel
Section J
Page 6