Dometic SeaLand 8812 - Manual (Page 7)

7
hOlDing tanks
SeaLand macerator toilets operate with most
holding tank or treatment systems. If installed
with a holding tank, however, the capacity of
the tank should be sufficient to avoid the incon-
venience of discharging it too frequently. The
average flush volume is .96 gallons (3.6 liters)
including flushwater and waste. A 30-gallon tank
(114-liter) will become full in about 30 flushes.
CAUTION: Overfilling the holding
tank can create serious damage to
the sanitation system, such as rupturing the
holding tank and releasing tank contents into
the bilge. To prevent this possibility, Dometic
strongly recommends the addition of a “Full”
tank safety shut-down relay to the toilet’s
electronic control module (a pre-wired base
is provided for this relay inside the box). The
“Full” signal from the holding tank can be
generated by any SeaLand Tankwatch level
monitor system.
inSTALLATiOn – SySTEM DiAgRAMS (cont’d)
seacOcks
Seacocks are required by various marine regula-
tions. Only full flow, marine quality valves are
recommended. Some regulations require the
seacocks be configured so they can be locked in
a closed position. Seacocks MUST be installed
according to the manufacturer’s instructions.
wARning!
hAZARD OF FLOODing – if the toilet
is connected to ANY through-the-hull fittings,
properly installed seacocks MuST be installed
in all piping connected to through-the-hull
fittings. Seacocks MUST be easily accessible
to all users of the toilet or secondary valves
fitted in hoses where they are easily acces-
sible. All valves MuST be full bore valves and
of marine quality. Screw-to-close gate valves
are not recommended. Failure to do so can
result in flooding which can cause loss of
property and life.
riser step Or plinth
installatiOns (seat height)
SeaLand macerator toilets are available in
three models to accommodate various spaces.
While the major factor in selecting a model for
a boat is the space provided to fit the toilet
into the head compartment, seating height is
also important. A comfortable seating height is
about 20 inches (508 mm).
Toilet Model Seating height
882 13.5 in. (343 mm)
888 17 in. (432 mm)
889 16.75 in. (425 mm)
Refer to the dimensional drawings on page 2
and the chart below to determine the optimum
toilet for a given installation.