Inlet Plumbing Requirements; Outlet Plumbing Requirements - Dometic MASTERFLUSH MF7100 Instructions De Montage Et De Service

Macerator Toilet

8 .3 Inlet plumbing requirements

For seawater/sea water flush models:
• Seacock and inlet water line (not supplied with
toilet):
– 3/4 in. (19 mm) full-flow seacock and
3/4 in. (19 mm) ID flexible hose. Follow seacock
manufacturer's installation instructions.
– Make sure inlet seacock is below sea water line at
all times, during all conditions of full heel.
– Make sure all inlet hose connections have no
sharp bends or restrictions.
– Use two stainless steel hose clamps at each
connection.
– Provide hose support every 3 ft. (0.9 m) along
inlet hose run to limit movement.
– Keep hose runs as short as possible. Eliminate
sags or low spots that may hinder flow.
• Water inlet strainer (not supplied with toilet)
– 100-mesh strainer is recommended between inlet
seacock and seawater flush toilet.
• Inlet check valve for above-waterline
installations (not supplied with toilet):
– A check valve should be installed in inlet supply
line to assure toilet's seawater pump stays primed
between flushes.
– Check valve should be located as close as
possible to the inlet seacock (fig. 8, 9).
• Vented loop (not supplied with toilet):
– If the toilet rim will ever be less than 8 in. (20 cm)
above the highest possible waterline at any point
of heel, trim or load, then a 3/4 in. (19 mm)
vented loop must be installed in the inlet hose
between the inlet seacock and the toilet (fig. 10,
11).
– Vented loop must be positioned a minimum of
8 in. (20 cm) above highest possible waterline
during all conditions of heel, trim, or load.
I Be sure to install a vented loop that will not
prevent required water flow to toilet when toilet
is being flushed. An electric solenoid type is
recommended.
EN

Warning!
Do not connect sea water flush toilet inlet line to a
pressurized freshwater system. This will result in a
continuously running freshwater pump, which can
possibly overflow the toilet bowl, flood the boat,
and cause potential loss of property or life.

Warning!
Do not connect sea water flush toilet inlet line to an
onboard potable water system in any way. This can
cause contamination of the potable water system.
If fresh water is desired, purchase the freshwater-
flush version of the toilet, or provide a separate
freshwater tank that supplies water only to the
toilet.
For freshwater flush models:
• Inlet water line (not supplied with toilet):
– 0.5 in. (13 mm) ID flexible hose with 1/2 in. NPT
fitting connects to toilet water valve.
• Shut-off valve in inlet line (not supplied
with toilet):
– For toilet cleaning and maintenance.

8 .4 Outlet plumbing requirements

For seawater/sea water flush models:
• Seacock and outlet sanitation hose (not supplied):
– 1 in. (25 mm) or 1.5 in. (38 mm) full-flow seacock
and flexible hose to route waste to a holding tank
with discharge pump, or route directly overboard.
Follow seacock manufacturer's instructions.
– Make sure waste outlet seacock is both aft and
higher than the water inlet seacock.
– Outlet plumbing should have no sharp bends or
restrictions.
– Use two stainless steel hose clamps at each
connection.
– Provide support along entire hose run to limit
movement and side-loading on connections.
– Keep hose runs as short as possible. Eliminate
sags or low spots that may hinder flow.
Installation
13