4
All dimensions in millimetres with inch equivalents in brackets.
Option 2: Toilet always above the heeled waterline
YOU MAY need A 19mm (3/4") non-return valve, Jabsco part
number 29295-1011
Run the inlet hose by the most direct route from the inlet
•
seacock to the flushing pump inlet tail.
For maximum convenience of use, install a 19mm (
•
3/4")
in-line non-return valve next to the inlet seacock, which
will ensure that the pump remains primed in between
usages.
5.3 Outlet Pipework - 4 options
Option 1: Toilet below the waterline and discharging
overboard. (See Figure 1 on Page 3)
YOU MUST fit a 38mm (11/2") Vented Loop fitting, Jabsco part
number 29015-0010.
Arrange the outlet hose to form a loop which is at least
•
20cm (8") above the highest possible waterline, and fit
the vented loop at the highest point.
Option 2: Toilet above the waterline, and discharging
overboard. (See Figure 2 on Page 3)
YOU MAY fit a 38mm (11/2") Vented Loop fitting, Jabsco part
number 29015-0010.
Run the outlet hose up from the discharge elbow to form
•
a loop at least 30cm (12") higher than the discharge
elbow.
If you fit a vented loop at the top of the hose loop this
•
will ensure that you can keep some water in the base of
the toilet without risk of it being siphoned away.
Option 3: Toilet waste discharging into holding tank, top of
holding tank above discharge elbow at anytime. (See Figure
3 below)
YOU MUST fit a 38mm (11/2") Vented loop fitting, Jabsco part
number 29015-0010.
•
If there is ANY possibility that the discharge elbow may
be below the top of the tank at ANY time, a ventilated
anti-syphon loop must be fitted in the outlet pipework to
ensure that the contents of the tank do not syphon out
through the bowl.
Arrange the outlet hose to form a loop which is at least
•
20 cm (8") above the highest possible level that the tank
may reach, and fit the Vented Loop at that highest point.
Option 4: Toilet waste discharging into holding tank,
discharge elbow always above top of holding tank. (See
Figure 3 below)
Run the outlet hose up from the discharge elbow to form
•
a loop at least 30cm (12") higher than the discharge
elbow.
This will create a water seal at the Joker Valve that will
•
prevent bad odours from escaping through the toilet.
YOU MAY fit a 38mm (11/2") Vented Loop fitting, Jabsco part
number 29015-0010.
•
If you fit a vented loop at the top of the hose loop this
will ensure that you can keep some water in the base of
the toilet without risk of it being siphoned away.
38mm (1 1/2")
VENTED LOOP
HOLDING TANK
VENT PIPES
AT LEAST
20cm (8")
OPTIONAL 38mm
(1 1/2") VENTED
LOOP
AT LEAST
30cm (12")
DISCHARGE
ELBOW
Option 3
Top of Holding Tank above
Discharge Elbow at any
time
Option 3
Holding Tank below
Discharge Elbow
Figure 3
