Standard Marine Head System; Macerator Delete Head System (Option) - Maxum 4600 SCB Owner's Manual Supplement

28 Chapter 2: Components/Systems
Sta nd a r d Ma r i n e He a d S y s t em
Your yacht comes with a marine head (toilet) and holding tank system. Be sure to read the manufacturer's operation
manual included in your yacht's owner's packet. The standard marine head system installed on your yacht uses raw
water to flush waste from the toilet directly into the holding tank.
STANDARD HEAD SYSTEM ROUTING
HOLDING TANK
VENT TO THRU-HULL
AFT
HOLDING
TANK
REDUCING
ADAPTER
UNDERWATER
DISCHARGE
SEACOCK
TO STBD. HEAD
RAW WATER
INTAKE VALVE
WASTE FROM
(SEACOCK)
STBD. HEAD
Manual Flush Marine Head Operation:
1. OPEN the head's raw water intake valve (seacock).
2. Before using the head, pump enough water into the
bowl to wet the sides.
3. After use, pump until the bowl is thoroughly
cleaned. Continue pumping a few more times to
clean the lines. If excess waste causes the water to
rise in the bowl, stop pumping until the water
recedes.
• If you are unable to pump water into the bowl, the
probable cause is debris in the pump diaphragm. To
remedy this, shut OFF the raw water intake valve
(seacock) and dismantle the pump. The pump is gen-
erally held together with six screws (the design is
simple and the problem will be obvious when the
pump body is split open).
• To winterize the head, shut OFF the intake seacock
and pump until the bowl is dry. Remove the drain
plug in the base and pump again to remove all of the
water. DO NOT fill the bowl with antifreeze.

Macerator Delete Head System (Option)

Since this optional system does not contain a macera-
tor, the holding tank is plumbed to a fitting on the deck
for dockside pump-out only.
4600 SCB Owner's Manual Supplement
TO DOCKSIDE PUMP-OUT
DECK FITTING
MACERATOR
Y-FITTING (TYPICAL)
WASTE
FROM
PORT HEAD
RAW WATER
TO PORT
HEAD
RAW WATER
• The raw water intake seacock is located inboard of
the holding tank and must be opened prior to using
the head system. The seacock should be left closed
whenever the yacht is left unattended.
• The holding tank is plumbed to a fitting on the star-
board deck for dockside pump-out and to a macerator
pump for pumping waste directly into the water
through an underwater discharge seacock (where reg-
ulations permit). The macerator switches are located
at the helm and must be pressed simultaneously for
pumping to occur.
• The holding tank is equipped with a level indicator
(located on the forward bulkhead in the head). Even
so, it is advisable to empty the holding tank at every
opportunity.
NOTICE
Check with local authorities for regulations regarding
the legal use of marine head systems.
MACERATOR DELETE (OPTION) HEAD SYSTEM
HOLDING TANK
VENT TO
THRU-HULL
HOLDING
TANK
AFT
RAW WATER
RAW WATER TO
INTAKE VALVE
STARBOARD HEAD
(SEACOCK)
WASTE FROM
STARBOARD HEAD
TO DOCKSIDE PUMP-OUT
DECK FITTING
Y-FITTING
(TYPICAL)
WASTE FROM
PORT HEAD
RAW WATER
TO PORT
HEAD