1. Product Overview
The Little Giant 1-AA-18 (Model 500500) is a compact, 1/200 HP submersible pump designed for efficient water transfer. It features an 18-foot power cord and is suitable for a wide range of applications, including statuary fountains, water displays, air conditioners, machine tool coolants, and hydroponic systems.
Image 1.1: Front view of the Little Giant 1-AA-18 submersible pump, showing its blue housing and black screened intake.
2. Key Features
- Versatile Applications: Ideal for commercial, industrial, and residential uses such as fountains, water displays, air conditioners, machine tool coolants, and hydroponics.
- Durable Construction: Features an epoxy-coated die-cast aluminum housing and an oil-filled motor for extended life.
- Debris Protection: Equipped with a screened inlet to prevent debris from damaging the impeller.
- Motor Protection: Impedance protected motor ensures safe operation.
- Power Cord: Includes an 18-foot power cord for flexible placement.
Image 2.1: Diagram highlighting key features of the 1-AA-18 pump, including 1/4" MNPT threading, 90-degree adapter, 115-volt impedance protected oil-filled motor, 18-foot cord, screened intake, and epoxy-coated die-cast aluminum housing.
3. Setup Instructions
3.1 Unpacking and Inspection
- Carefully remove the pump and all accessories from the packaging.
- Inspect the pump for any signs of damage that may have occurred during shipping. Do not operate if damaged.
- Verify that all included components are present: submersible pump, 18-foot cord, garden hose adapter, and elbow accessory.
3.2 Discharge Connection
The pump features a 1/4-inch MNPT discharge. Connect appropriate tubing (e.g., 1/2-inch I.D. vinyl tubing) using the provided garden hose adapter and elbow accessory as needed.
Image 3.1: Rear view of the pump, illustrating the power cord entry point and the threaded discharge port for hose connection.
3.3 Placement
This pump is designed for submersible use only. Ensure the pump is fully submerged in the liquid it is intended to transfer. Position the pump on a stable, level surface to prevent tipping and ensure proper water intake.
Image 3.2: The submersible pump shown fully immersed in water, demonstrating correct placement for operation.
4. Operating Instructions
4.1 Power Connection
Once the pump is correctly positioned and the discharge line is connected, plug the 18-foot power cord into a grounded 115-volt, 60 Hz electrical outlet. The pump will begin operating immediately.
4.2 Continuous Operation
The pump is designed for continuous operation when fully submerged. Ensure the water level remains above the pump's intake to prevent dry running, which can cause damage.
4.3 Shutting Down
To stop the pump, simply unplug the power cord from the electrical outlet. If the pump is used for siphoning, water may continue to drain until the siphon effect is broken.
Image 4.1: The pump operating in a garden fountain, demonstrating its use in water features.
Image 4.2: The pump in an industrial setting, illustrating its application for machine tool coolants.
Image 4.3: The pump integrated into a hydroponic system, showing its use in plant cultivation.
5. Maintenance
5.1 Cleaning the Screened Inlet
Periodically inspect the screened inlet at the bottom of the pump for debris accumulation. A clogged screen can reduce pump performance and potentially lead to overheating. Unplug the pump and remove any debris from the screen.
Image 5.1: Underside of the pump, showing the screened intake designed to filter out larger debris.
5.2 Oil-Filled Motor
The pump features an oil-filled motor for lubrication and cooling. While designed to be permanently oiled, monitor for any signs of oil leakage, especially if the pump is used in sensitive environments. If oil leakage is observed, discontinue use and contact customer support.
5.3 Winterization (for outdoor use)
If used outdoors in climates where temperatures drop below freezing, remove the pump from the water before the first freeze. Clean the pump thoroughly and store it in a dry, frost-free location to prevent damage from ice expansion.
6. Troubleshooting
6.1 Pump Not Running
- Check Power: Ensure the pump is securely plugged into a functional 115-volt outlet. Test the outlet with another device.
- Thermal Overload: The motor is impedance protected. If the pump overheats due to low water levels or debris, it may shut off. Unplug the pump, allow it to cool, clear any obstructions, and ensure adequate water for submersion before restarting.
6.2 Low Flow or No Water Output
- Clogged Intake: Unplug the pump and inspect the screened inlet for debris. Clean thoroughly.
- Kinked or Obstructed Discharge Line: Check the hose or tubing for kinks or blockages.
- Insufficient Water Level: Ensure the pump is fully submerged and the water level is adequate.
6.3 Unusual Noise or Vibration
- Debris in Impeller: Unplug the pump and check for any foreign objects caught in the impeller.
- Improper Placement: Ensure the pump is on a stable surface and not vibrating against the container walls.
7. Specifications
| Specification | Value |
|---|---|
| Model Number | 500500 (1-AA-18) |
| Voltage | 115 Volts |
| Frequency | 60 Hz |
| Horsepower (HP) | 1/200 HP |
| Running Amps | 1.1 Amps |
| Wattage | 70 Watts |
| Maximum Flow Rate | 170 GPH (at 1-ft. lift) |
| Shut-off Head | 7 feet |
| Maximum PSI | 3.0 PSI |
| Discharge Size | 1/4-inch MNPT |
| Cord Length | 18 feet |
| Material | Epoxy-coated Die-cast Aluminum |
| Maximum Liquid Temperature | 120°F (intermittent) |
| Product Dimensions (L x W x H) | 6.25" x 6.25" x 4.5" |
| Item Weight | 3.7 Pounds |
Image 7.1: Technical drawing illustrating the dimensions (Height, Length, Width) and weight of the 1-AA-18 pump.
8. Warranty and Support
8.1 Manufacturer's Warranty
This Little Giant pump is covered by a 1-year manufacturer's warranty from the date of purchase. Please retain your proof of purchase for warranty claims. The warranty covers defects in materials and workmanship under normal use.
The warranty does not apply if the product is used to pump or circulate anything other than fresh water at room temperature, or if damage results from misuse, abuse, neglect, improper installation, or unauthorized repairs.
8.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Little Giant customer support. Refer to the official Little Giant website for current contact information.
8.3 Frequently Asked Questions (FAQ)
- Do you support your products? Yes, Little Giant provides support for its products.
- 30 Day Return Policy: For items purchased within 30 days, please refer to the retailer's return policy.
- After 30 Days: If Amazon.com is the seller, your product is covered by the terms outlined in this manual. For other sellers, contact them directly. Our staff can assist with troubleshooting or installation.
9. About Little Giant
Little Giant has been a trusted name in pumps for over 80 years, known for reliability and technical expertise across various applications including HVAC, plumbing, pool, and hydroponics. The brand's commitment to quality ensures products that stand the test of time.
Video 9.1: An overview of Little Giant Pumps, highlighting 80 years of experience and their presence in various industries like HVAC, plumbing, pool, and hydroponics.