459 Motoryacht • Owner’s Manual Chapter 6: Plumbing
57
Drain Systems
Deck Drains
• Water on the deck is drained overboard through the deck drains.
• Keep the deck drains free of debris.
Gray Water Drains
The galley sink is above the waterline and is gravity drained overboard.
Sump Pump Drain System
• The showers and head sinks drain
into sump pump boxes.
• Each sump pump box has a
float switch.
• When water rises to a preset level the
float switch turns On a sump pump,
to pump the water overboard
Sump Box Cleaning
Periodically clean each sump box, filter, and pump as follows:
1. Remove the cover screws (A) and the cover (B).
2. Remove any debris from the box and the filter.
3. Clean the sump pump as outlined in the Bilge Pump section of
this manual.
Sump System Winterization
Drain the sump pump systems in the winter months when not in use.
1. Disconnect and drain all lines to the unit.
2. Remove the screws from the mounting feet (C).
3. Turn the box upside down to remove the rest of the water.
4. Reinstall the screws in the mounting feet and reconnect the system.
SUMP PUMP DRAIN SYSTEM ROUTING
OVERBOARD
THRU-HULL
FORWARD SUMP
PUMP BOX
AFT SUMP
PUMP BOX
AFT HEAD
FLOOR DRAIN
OVERBOARD
THRU-HULL
FORWARD HEAD
FLOOR DRAIN
AFT SHOWER
DRAIN
FORWARD
SHOWER DRAIN
AB
C
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