Xylem JABSCO 29120-5000 Installation Instructions Manual page 3

CAUTION: Do not apply flame to the hose. Do
not apply flame or any heat to the plastic hose
tails on the toilet. Do not use oils, greases or syn-
thetic lubricants. Do not apply sealing compounds
to any hose connections. Do not over tighten hose
clamps. Any of these actions may result in crack-
ing or breakage of the plastic parts of the toilet.
• Secure the ends of all hoses to the hose tails with two stainless
steel worm-drive hose clips, ensuring that all inlet connections
are airtight and that all outlet connections are watertight.
• The Discharge Elbow (key 34) may be rotated 360° to suit your
installation. Always slacken the 2 securing screws, adjust the
discharge elbow to the required position and re-tighten the 2
securing screws BEFORE you connect the hose to it.
CAUTION: Failure to follow this procedure may
result in leaks between the discharge elbow and
the pump cylinder.
5.2 Inlet Pipework - 2 options
Option 1: Toilet below the waterline
YOU MUST fit a 19mm (3/4") Vented Loop fitting, Jabsco part number
29015-0000.
• Run the inlet hose by the most direct route from the inlet seacock
to the flushing pump inlet tail.
• Remove the white hose supplied with the toilet, which connects
the flushing pump outlet tail to the elbow (key 6).
• Rotate the intake seal (key 5) so that the elbow points upwards.
• Replace the white hose with a longer length of 19mm (3/4") id
hose and install an anti-syphon loop whose highest point is at
least 20cm (8") above the highest possible waterline.
• Secure the ends of all hoses with two stainless steel worm-drive
hose clamps.
HAZARD RISK: Bowl rim below waterline.
If the toilet is connected to ANY through-hull fittings, and if the rim of
the bowl falls below the waterline, water may flood in causing the craft
to sink, which may result in loss of life.
Therefore, if the rim of the toilet is less than 20cm (8") above the water-
line when the craft is at rest, or if there is ANY possibility that the rim of
the bowl may be below the waterline at ANY time, a ventilated anti-sy-
phon loop MUST be fitted in any pipework connected to a through-hull
fitting, irrespective of whether inlet or outlet. USE VENTED LOOPS!
Figure 1.
19 mm (3/4")
VENTED LOOP
38 mm (1 1/2")
VENTED LOOP
AT LEAST
20 cm (8")
38 mm (1 1/2")
OUTLET SEACOCK
19 mm (3/4")
INLET SEACOCK
Installation Instructions
SPECIAL NOTE 1: The smaller bore inlet pipework is more hazardous
than the larger outlet pipework. Unless there is a ventilated antisyphon
loop in the inlet pipework, water will flow into the bowl whenever both
the inlet seacock is open and the rim of the bowl is below the actual
waterline.
Although moving the Flush Control Lever (key 23) to the "Shut" posi-
tion will restrict the flow, this lever CANNOT be relied upon as a shut-
off valve.
SPECIAL NOTE 2: Making a loop in the hose without fitting a vent may
be just as hazardous as no loop at all, because water may syphon over
a loop. It is the vent that actually prevents the syphon.
YOU MAY need A 19mm (3/4") non-return valve, Jabsco part number
29295-1011
Option 1: 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 below).
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 below).
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 hold-
ing tank is above discharge elbow at anytime.
(See Figure 3 below).
YOU MUST fit a 38mm (11/2") Vented loop fitting, Jabsco part num-
ber 29015-0010.
• If there is ANY possibility that the discharge elbow may be be-
low the top of the tank at ANY time, a ventilated anti-syphon
loop must be fitted in the outlet pipework
Figure 2.
DISCHARGE
ELBOW
OPTIONAL:
NON-RETURN VALVE
OPTIONAL: 38 mm (1 1/2")
VENTED LOOP
AT LEAST
30 cm
(12")
38 mm (1 1/2")
OUTLET SEACOCK
19 mm (3/4")
INLET SEACOCK
3