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Dometic MasterFlush Toilet Intended use / Specifications
Caution!
Overlling the holding tank can create serious damage to the sanitation system, such as
rupturing the holding tank and releasing tank contents into the motorhome. To prevent
this possibility, Dometic recommends using the “full” tank shut-down circuitry in the toi-
let’s electronic control module. The “full” signal from the holding tank can be generated
by an optional Dometic DTM01C tank monitor or DTM04 four-level tank monitor system.
3 Intended use
The MasterFlush 7640 toilet provides an electric-ush toilet that macerates waste and pumps it to a
holding tank or other efuent storage/disposal system. Operated by a ush pedal, the toilet allows
the user to add water to the bowl (before using or ushing) and to ush the toilet.
3.1 Benefits
Convenient electronic flush. Add water or ush by pressing on the ush pedal.
Choice of two water consumption settings. “Normal” ush uses 0.83 gal. (3.1 liters) per ush
and adds water to bowl after ush; “Dry Bowl” setting uses only 0.21 gal. (0.79 liters) per ush and
does not add water to the bowl.
Versatile installation. Powerful macerator pump allows toilet to be located up to 40 ft. (12.2 m)
away from holding tank or other discharge line destination.
Automatic “full tank” shut-down. When connected to a holding tank level indication system
(such as Dometic DTM01 system), the MasterFlush 7640 toilet will not ush when the holding tank
is full. This safety features prevents overlling the holding tank, which may cause damage to the
motorhome.
4 Specifications
4.1 Materials
Materials
Toilet bowl: vitreous ceramic
Toilet seat: enameled wood
Toilet base: polypropylene
Macerator pump body: glass-lled polypropylene
Water valve: polypropylene
Foot pedal: polypropylene
Vacuum breaker: ABS/polypropylene
Floor flange seal: nitrile rubber, foam
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