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9
TROUBLESHOOTING GUIDE (cont’d)
13.Toilet will not flush.
(No vacuum.)
See problems 3 and 14
if necessary.
14.Blockage between toilet and
vacuum generator.
15.Pump emits odor.
a. There is a blockage in the system.
b. Pump will not run.
c. Duckbill valves in vacuum pump
are inverted due to blocked
discharge line or an attempt to
pump out against closed seacock.
a. Collapsed vacuum line.
b. Sharp bends or kinks in vacuum
hose.
c. Improper operation of toilet.
d. Foreign objects were flushed
down toilet.
a. Loose or defective hose
connection on pump.
b. Loose intake or discharge fittings
on pump.
c. Worn, torn or punctured pump
bellows (vacuum generator) or
diaphragm (vacuum holding tank).
a. Open flush ball and check the 1-
inch (25mm) orifice at the bottom
of the base for blockage and
dislodge it. Never use drain-
opening or other household
plumbing chemicals.
If blockage is not in base, it may be
found in these locations:
• inlet of vacuum generator
• diptube of vacuum generator
• inlet of vacuum pump
• outlet of vacuum tank
b. See problem 11.
c. Replace duckbill valves, making
sure they point in the correct
direction.
a. Inspect vacuum line for collapsed
condition and replace line if needed.
b. Inspect vacuum hose for kinks or
bends. If less than 8.5-inches
(216mm) radius on any bend,
reposition hose to achieve
minimum 8.5-inch bend radius.
c. Make sure each person using toilet
knows correct procedure.
d. DO NOT flush any non-dissolving
items (i.e. sanitary napkins, facial
tissue, wet strength tissue, paper
towels, etc.) or excessive toilet
tissue. Rapid-dissolving SeaLand
brand toilet tissue is best.
a. Tighten connections or replace
hose and make new connections.
b. Tighten intake or discharge fittings
on pump. Replace nipples or
adapters if necessary.
c. Replace pump bellows or
diaphragm.
Problem Possible Cause Service Instructions