Inlet Plumbing Requirements - Dometic MASTERFLUSH MF7100 Instructions De Montage

Dometic MasterFlush
5.3

Inlet plumbing requirements

For sea water fl ush models:
1. Seacock and inlet water line (not supplied with toilet):
a. 3/4 in. (19 mm) full-fl ow seacock and 3/4 in. (19 mm) ID fl exible hose. Follow seacock
manufacturer's installation instructions.
b. Make sure inlet seacock is below sea water line at all times, during all conditions of full heel.
c. Make sure all inlet hose connections have no sharp bends or restrictions.
d. Use two stainless steel hose clamps at each connection.
e. Provide hose support every 3 ft. (0.9 m) along inlet hose run to limit movement.
f. Keep hose runs as short as possible. Eliminate sags or low spots that may hinder fl ow.
2. Water inlet strainer (not supplied with toilet)
a. 100-mesh strainer is recommended between inlet seacock and sea water fl ush toilet.
3. Inlet check valve for above-waterline installations (not supplied with toilet):
a. A check valve should be installed in inlet supply line to assure toilet's sea water pump stays
primed between fl ushes.
b. Check valve should be located as close as possible to the inlet seacock (
4. Vented loop (not supplied with toilet):
a. 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 (
b. Vented loop must be positioned a minimum of 8 in. (20 cm) above highest possible waterline
during all conditions of heel, trim or load.
Warning!
Do not connect sea water fl ush toilet inlet line to a pressurized freshwater system.
This will result in a continuously running freshwater pump, which can possibly overfl ow
the toilet bowl, fl ood the boat, and cause potential loss of property or life.
Warning!
Do not connect sea water fl ush 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-fl ush version of the toilet, or provide a separate
freshwater tank that supplies water only to the toilet.
For freshwater fl ush models:
1. Inlet water line (not supplied with toilet):
a. 0.5 in. (13 mm) ID fl exible hose with 1/2 in. NPT fi tting connects to toilet water valve.
2. Shut-off valve in inlet line (not supplied with toilet):
a. For toilet cleaning and maintenance.
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Installation
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