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21
F l u i d W a s t e E v a c u a t i o n & D i s p o s a l
TROUBLESHOOTING
Backwash Procedure
If unit is running, but suction is weak, something could be
caught in the suction line. You will need to backwash the
suction line.
1. Remove the brass check valve before the gray suction hose
along with the suction hose (non-rinsing units only).
2. Screw the suction line back into the Aqua-Box without
the check valve (non-rinsing units only).
3. Open the thumb valve of the suction hose with the tube
attached, placing the tube in a canister, sink, or bucket.
4. With the Aqua-Box running, slowly start closing the ball
valve on the discharge side of the Aqua-Box unit (left lower).
Only close the valve enough to dislodge stoppage, and then
reopen the valve.
5. Remove the gray suction hose and replace the check valve
on the suction line.
6. Resume usage of the unit.
7. (For non rinse units only) If the back wash does not clear
the suction port, remove the check valve, and insert a stiff wire
with a small bend at the end into the suction port as far as it
will go. Rotate the wire to catch and solids that are lodged.
Remove the solids and back wash again to make sure the port
is clear. Replace the check valve and the suction line.
PROBLEM
POSSIBLE CAUSE
SOLUTION
The Aqua-Box does not
operate.
The electricity is not connected (models 1500
and 1300 only)
• Plug in the power switch/timer box.
• Check the circuit breaker or fuse to the electrical outlet
The RPZ valve is incorrectly installed or not
working properly.
• Check that the RPZ valve is installed correctly with the water flow in the correct
direction (refer to water flow arrow on valve).
• Have the RPZ valve inspected by certified plumber or as per local code.
The Aqua-Box leaks.
A plumbing connection is loose.
• Check all connections. Be sure to use the included thread sealant on the PVC
connections.
• Check any copper pipe connections that the “sweated” joint is complete.
The RPZ valve drips from
the vent.
The RPZ valve is incorrectly installed or not
working properly.
• Check that the RPZ valve is installed correctly with the water flow in the correct
direction (refer to water flow arrow on valve).
• Have the RPZ valve inspected by certified plumber or as per local code. Have the RPZ
valve rebuilt or replaced as required.
• Some degree of dripping from the vent is normal. Install an optional air gap drain.
The Aqua-Box runs but the
suction is weak.
The water flow is too low.
• Check the water flow. These need to be a minimum of 12 GPM for all models. If
pressure gage is supplied with the Aqua-Box, the minimum pressure after the solenoid
valve should not be less than 5 PSI.
• Make sure all ball valves are open in the full position.
The suction hose thumb valve is closed.
• Open the thumb valve on the grey suction hose.
The disinfectant is empty.
• Check disinfect supply, if empty replenish.
• If disinfect is not being used, make sure valve is in the off position
The unit is clogged.
• Clean the unit with an enzymatic solution (see Maintenance section)
• Check the grey suction hose for clogs or debris.
• Backwash the AquaBox (see Backwash Procedure section)
