Plumbing Connections
Pump should be mounted as near as possible to tank to minimize dry run. Pump is self-priming to a five-foot lift. To maximize
efficiency, mount near the holding tank.
INLET:
Always install pump with a shut-off valve between pump and holding tank.
Hose:
Use 1-1/2” (38.1mm) ID [non-collapsible vacuum rated] hose on inlet [suction] side. Use stainless steel hose
clamps on all sanitation connections.
Flange:
To mount 1-1/2” (38.1mm) female flange, inlet barb must be cut off just before threads. Seal threads and hand
tighten.
Any air leak on inlet side can cause pump to run dry and can damage impeller and housing. Check all
inlet hose connections, even those on deck plates. All hose runs should be smooth with no kinks or sharp angles.
OUTLET:
Use 1” (25mm) minimum ID hose on discharge side of pump. Connect to thru-hull fitting above highest heeled point
above waterline. Vented loop installations must vent at least 10” (254mm) above highest heeled point above waterline. Use
stainless steel hose clamps on all sanitation connections.
!
Operation -
INTERMITTENT USE ONLY!
Pump switch must be near pump and tank so operator can hear pump running. Make sure shut-off valve to pump and dump
valve [if equipped] are both open. Turn on momentary switch and pump out tank. When tank is empty, pump will get louder
with a high pitch sound. Immediately turn pump off, or damage to impeller and housing will occur. Do not run pump dry for
more than 15 – 20 seconds. Flush tank and pump with water after each use. This macerator will handle normal waste, tissues,
cigarettes, fish scales, etc. It is not designed to handle large hard objects such as large bones or fruit pits.
Maintenance and Storage
To service the pump, disconnect power to the pump. Perform maintenance or repairs. Follow the directions below to
disassemble and reassemble the pump. Test after servicing.
Flush with water after each use and check wire connections occasionally.
After periods of non-use, impeller can stick. To loosen, open rear shaft cover and turn motor shaft clockwise with a flat
tip screwdriver. Then replace shaft cover.
For extended periods of non-use, pump impeller can be lubricated by running a small amount of mineral oil through
holding tank system.
Turn off all power and disconnect battery before starting to disassemble!
Rear end cap/ motor shaft slot access:
1.
Loosen end cap screws.
2.
Rotate shaft cover to access slot on motor shaft.
3.
Turn shaft clockwise.
Pump disassembly:
1.
Remove cover screws.
2.
Remove cutter housing.
3.
Remove hex nut and cutter blade.
4.
It may be necessary to hold the motor shaft steady. Insert a screwdriver into slot on motor shaft, or slip a thin wrench
(9/32” [7mm]) behind blades onto flat of motor shaft.
5.
Remove top wear plate, gaskets, impeller and bottom wear plate.
