SYSTEM OPERATIONS-53
and is controlled by DC Electrical Power.
Each toilet is equipped with an integral
vacuum breaker that prevents a backfl ow
of contaminated water into the potable
water supply. Vacuum energy, supplied by
the Vacuum Pump, is stored in a Vacuum
Tank and is monitored to maintain a cer-
tain level. The Vacuum Pump is controlled
by an electrical breaker switch, located on
the DC Electrical Panel (Refer to the Elec-
trical Pages of this section in this Owner’s
Manual for the location of the switch). As
the toilet is fl ushed, vacuum energy is
depleted and the Vacuum Pump will auto-
matically activate to restore the required
level. The Vacuum Pump will operate for
approximately 30 to 90 seconds until the
system reaches the required operating
vacuum level. Toilet waste, both liquid and
solid, is removed by the vacuum energy
and water combination to a Waste Tank
having a capacity of thirty-nine (39) gal-
lons. The Mechanical Layout in the Sche-
matics Section of this Owner’s Manual
shows the location of the Tank.
This waste is stored in the Waste Tank
until pumped out at a proper facility. The
photo below shows the waste tank. It is
accessed by removing the cover of the
port side bunk in the Mid Stateroom.
The Waste Tank is equipped with an elec-
tronic Waste Level Gauge, which monitors
MARINE SANITATION SYSTEM
All vessels with fi xed toilets that are op-
erated on the waterways of the United
States and some foreign countries are
required to be equipped with an oper-
able Marine Sanitation Device(MSD). The
Marine Sanitation System in your 43SB
is a Waste Tank system, defi ned by the
United States Coast Guard as a Type III
System. Type III Systems permit operation
of the toilet without the direct discharge
of untreated waste after every fl ush. Type
III Systems can be discharged at marina
dockside pump-out stations or, if in coastal
waters, at least three (3) miles offshore.
NOTE: Overboard discharge capability
must remain inoperative while within the
three (3) mile limit. This is accomplished
by closing the macerator discharge thru-
hull valve (Refer to the Mechanical Layout
Schematic in the Schematic Section of
this Owner’s Manual for the location of the
valve).
Your 43SB is equipped with one of the
following Marine Sanitation Systems,
depending on the option you chose from
your Silverton Dealer at the time of pur-
chase:
•Vacu-Flush Toilet
•Quiet-Flush Electric Toilet
(Fresh Water)
•Electric Toilet (Raw Water)
SeaLand Vacu-Flush Toilet
This system is operated by vacuum, com-
bined with a small quantity of water sup-
plied by the pressurized fresh water sys-
tem (approximately one (1) pint per fl ush)
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