Mainship 40 Trawler Single Operator's Manual - page 112
Mainship 40 Trawler Single & Twin • Waste and Sanitation
10.2
This section outlines the use, care, and maintenance of
your boat’s waste and sanitary systems, as well as, bilge
pumps.
Important: U.S. Coast Guard regulations require that
boats have a sanitation system on board to control pol-
lution. Waste is to be stored in a holding tank or other
device so it can be properly disposed of at a shore facil-
ity. Discharging this waste overboard in U.S. lakes, riv-
ers, bays, and sounds, and within three miles of shore
in international waters is prohibited. Check with the
Coast Guard regarding regulations in your area.
Sanitation Systems
Your boat is comprised of three sanitation systems Black
Water, Gray Water and Bilge Water. The components that
are used in each system are broken down in this chapter.
The components are as follows:
Black Water:
•
Electric Tiolet
•
Holding Tank
•
Macerator Pump
Gray Water:
• Shower Sump Pump
Bilge Water:
•
Bilge Pumps
•
High Water Alarm
10.1 Black Water
10.1.1 Electric Toilet
Electric macerating heads are only a little more complex
than a manual head. They are typically designed to use
raw water. An impeller pump replaces the piston type
found in manual heads, and there is also a discharge.
Between the two is a device called a macerator that is
not totally unlike a blender or a garbage disposal that
purees solid waste and paper. Macerating heads require
more flush water than any other type of toilet, a minimum
of 1 gallon ot rinse urine completely out of the machin-
ery, a minimum of 3 gallons to clear solids and paper.
Insufficient flushing shortens the life of the motor and
macerator.
The 12 volt electric marine toilet comes with a compact
white vitreous china bowl and is equipped with a duel
function pump which eliminates having to mess with
hand pumps and dry bowl valves. With the simple push
of a single button, the self-priming flush pump rinses the
bowl.
This unique head has a powerful wastewater evacuation
pump with a built-in macerator and still has a remarkably
quit flush cycle. The pump is mounted remotely from the
toilet and supplies toilet bowl rinse water on demand
whenever triggered by the multi-function flush control. It
must not be connected to potable water because it does
not have a siphon breaker to protect against contamina-
tion. The unit features a mult-function flush control panel
with a single push-button flush control and a bowl fill/drain
selector switch. You can raise the water level prior to use
or drain the bowl in rough seas. Includes 6’L smooth white
hose to connect to back of the bowl with remote solenoid
valve. The rinse water is controlled by an electric solenoid
valve and siphon breaker that may be connected to any
pressurized water system that delivers 3 1/2 gpm.
Figure 10.1
Below is a general outline illustration for the Electric Head
system (Fig. 10.2). This illustration will give you idea
about the components in the system and the routing of
the waste lines.
10.1.1.1 Toilet Cleaning/Maintenance
Clean with mild cleaner and consult your owner’s packet
for further instructions.
Figure 10.2