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64 4537 • C3 7/06
INTERNAL SYSTEMS SECTION 4
Sanitation System
Your boat’s sanitation system includes the forward and aft heads, forward and aft
waste tanks, and an optional overboard waste discharge system. When properly
used, this system conforms to all United States antipollution laws.
Toilets
The two types of toilets available for your boat are described below. The electric,
seawater toilet is standard. If you have guests who are unfamiliar with marine
sanitation systems, instruct them on how to properly use the toilet. Refer to the
OEM information for details on operating the toilets.
Electric Toilets
Electric toilets use either seawater or fresh water to flush.
If the toilets use fresh water, there must be water in the fresh water tanks before
the toilets can be flushed.
If the toilets use seawater, you must open the seacock for each toilet before
the toilet can be flushed. The forward toilet’s seacock is located beneath a
hatch in the galley floor. The aft toilet’s seacock is located beneath the aft hatch
in the aft stateroom floor. Refer to Section 9 - Interior Hatches for the location
of these hatches.
Vacuum Toilets
The optional vacuum toilets use fresh water and vacuum pressure to flush.
It is common for vacuum systems to gradually lose vacuum pressure. When
pressure in the system drops below a predetermined level, the vacuum pump
engages automatically to bring vacuum pressure back to the optimum level.
NOTE: Whenever you don’t want to hear the toilet’s vacuum pump operating,
such as at night, you can temporarily shut it off using the Toilet Run/Sleep switch.
This switch is located on the front of the vanity in the aft head and above the toilet
in the forward head. Placing the switch in the “Sleep” position shuts off the toilet’s
vacuum pump.
A Tip From Carver!
If your boat will be left unattended for at least 48 hours, pump the foot lever in each
head several times. For electric heads, flush for at least 10 seconds. This ensures that
waste has cleared the sanitation transfer hose and has entered the waste tank. Waste left
in the transfer hose tends to dry and harden. This could become an obstruction which
prevents the sanitation system from operating properly.
Make sure that there is always a small amount of water left in the bowl of the head.
This acts as a trap and reduces odors.
If seawater is used to flush the head, material suspended in the water (seaweed, aquatic
organisms, etc.) can become trapped within the passages of the system and lead to bowl
staining and odors. Contact your marine supply dealer to obtain an in-line deodorant
dispenser that can minimize these problems.
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