Mainship 40 Trawler Single, Operator'S Manual

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Mainship 40 Trawler Single & Twin • Waste and Sanitation
10.4
4. When you hear the pump speed up (indicates tank
is empty), immediately switch the macerator breaker to
OFF.
5. Close the seacock.
WARNING
! !
Failure to close the overboard discharge valve when
not in use could cause the holding tank to fill and
possibly flood the boat.
10.2 Gray Water
10.2.1 Shower Sump Pump
The system directs waste water from the accessories
such as the galley and head sinks, air conditioning con-
densate and shower to the shower sump that is fitted with
a float switch and pump that pumps the water overboard
through a through hull side fitting.
The small holding tank also acts as a collection point for
hair and other waste materials that might get washed
down the shower drain.
The shower sump operation is automatic. An indicator
light on the helm stations illuminates when the pump is
operating. Figure 10.3 shows you the sump pump and
illustrates the disassembly for cleaning. You need to
ensure that the sump is clean and free of debris for the
operation to be functional.
The HEAD breaker switch on the DC Distribution Panel
controls the operation of the sump pump.
Figure 10.5
10.3 Bilge Water
10.3.1 Bilge Pumps
Your boat has three bilge pumps and one emergency
bilge pump: one forward, one midships and one aft. The
pumps, which operate automatically, have separate cir-
cuit breakers at the DC Distribution Panel.
When the water in the bilge rises to a preset level, a
float switch adjacent to the bilge pump turns the pump
on automatically. The pump runs until the water level
reaches a preset low level. When a pump is running its
indicator light at the helm stations comes on. The bilge
pumps can also be operated manually.
Note: Power is always available to the bilge pumps.
When a pump’s breaker is switched to OFF (or AUTO
mode), the pumps operate automatically. When it is
switched to ON (or MANUAL mode), the pump runs until
the breaker is switched to AUTO.
10.3.2 Emergency Bilge Pump
The emergency, or High Water Bilge pump, is located in
the aft section of your boat. It is mounted about 4” off the
bottom of the bilge. This is why it is referred to as a High
Water Pump. We discussed in the DC Electric section
about the float switch and the operation of the pump, so,
you already understand that the water level has to be
above a high water level to operate this pump. Figure
10.3 gives you a look at the emergency bilge pump
aboard your boat.
Should the water level rise above the high water mark,
and the emergency bilge pump comes online, you will
hear a high water alarm from the helm along with a solid
red light. It would also be important to mention here that
when you hear the high water alarm, it means that high
water exists in the bilges and it is time to take action.
Refer to the “Chapman’s Piloting, Seamanship and Boat
Handling.” We have supplied you with a copy of this book
aboard your new boat, but if you do not have one, it is
a wise idea to purchase this boating manual. It is full of
useful safety and navigational information.
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Screws