Regal 42SC Owner's Manual page 124

Typical Macerator (Overboard Discharge Pump)
MACERATOR
ON BUTTON
KEY SWITCH
MACERATOR
BREAKER
MACERATOR
macerator is activated through a key switch and button
located at the ship's main salon control panel (shown
above). At that point waste travels from the waste holding
tank through the macerator pump where it is ground up
and then exits through the hull bottom at the open seacock.
See the photo.
To Use Macerator (If Installed):
Make sure it is legal to pump waste overboard
before starting the operation.
Locate the overboard discharge seacock in the
engine room. Usually this seacock can be identifi ed by the
stack of tie wraps next to it. Also, look for the incoming
hose that runs from the output side of the macerator to
the seacock. It is normally a 1 1/2" diameter white hose.
Since the seacock by law must be have another means
besides the handle to keep it closed the tie wrap serves that
need. Cut the tie wrap to access the seacock handle.
The macerator (overboard
discharge pump) option is
located in the engine room.
It is connected to a normally
closed seacock. In locals
where it is approved the
seacock is opened and the
HOSE FROM
MACERATOR
SEACOCK IN
OPEN
POSITION
TIE WRAPS
MACERATOR SEACOCK
Open the seacock handle. It should be positioned
in line with the seacock as shown in the photo.
Activate the macerator breaker at the 12 volt salon
main DC control panel.
At the level monitor panel shown above turn the
key to the "on" position. With the key switch being held in
the "on" position push in on the macerator button to start
the overboard discharge. Continue to discharge the waste
until the monitor panel shows empty for the waste tank.
At this point, shut off the macerator switch, deactivate key
switch and turn macerator breaker to the "off " postion.
Close the seacock handle. It should now be at a 90
degree angle to the seacock.
Use a tie wrap and refasten the seacock handle
tightly so it can not be moved.
At this point you may desire to add an approved
holding tank deodorant by fl ushing the correct amount
down the toilet.
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Systems