Physical Installation - Little Giant 12E Series Owner's Manual

INSTALLATION

Physical Installation

Physical Installation
Risk of property damage due to flooding.
• Do not install the check valve in a vertical position, as solids may settle in the valve and prevent the valve from
opening on start-up. For best performance of the check valve when handling solids, install it in a horizontal posi-
tion or at an angle of no more than 45°.
• When a check valve is used, drill a relief hole (1/8" or 3/16" in diameter) in the discharge pipe. This hole should be
located below the floor line between the pump discharge and the check valve. Unless such a relief hole is pro-
vided, the pump could "air lock" and will not pump water even though it will run.
1. Install the pump in a suitable gas-tight basin that is at least 18" in diameter and 24" deep and
vented in accordance with local plumbing codes.
• Clean any debris from the basin and set the pump in the center of the basin.
• Refer to "Typical Installation" on page
• A solid bottom will prevent clogging of the pump from sand and dirt.
2. Place the pump-basin assembly on a hard, level surface.
• Never place the pump directly on clay, earth or gravel surfaces. These surfaces contain small
stones, gravel, sand etc. that may clog or damage the pump and cause pump failure.
3. Do not attempt to restrict the intake side of these pumps. Restricting the intake may cause damage
to the seal and may starve the pump.
• If reduced flow rates are required, place a valve on the discharge side of the pump.
• If flexible vinyl tubing is used, a clamp can be used on the tubing to restrict the flow.
4. Support the pump and piping and connect discharge piping, using pipe joint compound at all con-
nections.
• Failure to support the pump and piping may cause the piping to break, the pump to fail, motor
bearing failures, etc.
• The discharge pipe should be as short as possible and contain as few elbows as possible. The dis-
charge pipe should be the same diameter as the discharge size to reduce pipe friction losses. A
smaller pipe will restrict capacity and reduce pump performance.
• The pump comes with a 2" NPT female pipe thread discharge.
• Install a union in the discharge line just above the basin cover to allow for easy removal of the
pump for cleaning or repair.
5. Install a check valve in the discharge line to prevent back-flow of liquid into the basin.
• The check valve should be a free-flow valve that will easily pass 3/4" solids.
6. Tape the pump and switch cords to the discharge line with electrical tape to protect the cord from
damage.
7. Test the operation of the pump system. Refer to
IMPORTANT: Do not attempt to operate the pump without water; this will damage the seals and
bearings and could result in permanent damage to the pump.
8. Place cover over basin to help prevent debris from entering the pit and accidental injury.
4
3.
"Operation Testing" on page 5.