Dometic CTS 4050 Notice D'utilisation page 29

Fill a small amount of a Dometic sanitary
additive (see notes in section 1.10) into the
cassette tank via the spout.
Put the cassette back in and push it in until
it stops.
Ensure that the tank can be smoothly
inserted. Do not use force!
The tank's lock shuts automatically when
inserted. But check that the cassette tank is
firmly attached.
Close and lock the service door.
All manuals and user guides at all-guides.com
Fig. 8
11
4.3 Filling fresh water tank
Fill the fresh water tank via the filling piece on
the outside of the vehicle. The quantity
depends on the tank used (on-board tank or
integrated toilet tank with models CTW 4xxx,
option with models CTS 4xxx and CTLP 4xxx).
4.4 Control panel
1
2
3
1
"Flush" button
2
"Cassette tank removed" display
3 "Fill fresh water tank" display*
4 "Cassette tank 3/4 full" display
5 "Cassette tank full" display
* not connected as a rule when using the on-board tank.
Using the toilet
Fig. 9
5
4
Fig. 10