User Manual for Little Giant 6EC & 10EC Series Sump Pumps

Quick Guide from the Manual

The Little Giant 6EC and 10EC series are submersible sump pumps designed for use in basins or lift stations. They are suitable for pumping clear water or effluent gray water containing semi-solids up to 1/2 inch in diameter. Do not use these pumps for sewage, abrasive materials, or corrosive liquids.

Safety Instructions

DANGER: Risk of death, personal injury, or property damage due to explosion, fire, or electric shock. Do not use to pump flammable or explosive fluids. Do not handle the pump with wet hands or while standing on wet surfaces.

WARNING: High voltages are present. Always disconnect power before servicing. Use a properly grounded receptacle. Do not use an extension cord.

NOTICE: Do not run the pump dry. This can cause overheating, damage the seals, and void the warranty. The pump is not suitable for pond applications.

Installation

The pump must be installed in a gas-tight basin at least 18 inches in diameter and 24 inches deep. Place the pump on a hard, level surface; never place it directly on clay, earth, or gravel. Connect the discharge piping using pipe joint compound. A check valve must be used in the discharge line to prevent backflow. Drill a 1/8 inch or 3/16 inch relief hole in the discharge pipe below the floor line to prevent air locking.

Electrical Connections

Check the pump label for the correct voltage. A ground fault circuit interrupter (GFCI) is required. The pump should be connected to its own dedicated circuit. Do not modify the power cord or remove the grounding prong.

Operation Testing

Before automatic operation, ensure the gate valve in the discharge line is open. Run water into the basin until the pump activates. Confirm that the pump and switch function correctly, and that there are no leaks in the discharge plumbing. It is normal for a stream of water to spray from the air bleed hole in the pump's plumbing; ensure this spray is captured within the basin.

Maintenance

Inspect and test the pump system every three months. Let the pump cool for at least 2 hours before servicing, as the oil inside can become hot and pressurized. Check power cords for damage or corrosion. Remove debris from the basin and ensure the impeller turns freely. Do not open the sealed motor housing or remove the impeller, as this will void the warranty.

Troubleshooting

If the pump does not turn on, check if it is plugged in, check the circuit breaker, or inspect the float for obstructions. If the pump will not shut off, check for float obstructions or an air lock. If the pump runs but does not discharge, ensure the check valve is installed correctly and not stuck. If the pump cycles continuously, install a check valve or a larger basin.

Replacement Parts

Replacement parts include cover assemblies (115V/230V, automatic/manual), capacitor kits, float assemblies, and volute bases. Refer to the replacement parts diagram for specific part numbers.