| Little Giant PWM 3900 Magnetic Drive Waterfall Pump, 3300gph Wonderfully power your stream or waterfall efficiently using this Little Giant Magnetic Drive Waterfall Pump. This lasting, submersible unit is specifically designed to run continuously in fresh water, and has no seals or oil for consistent and safe operation. The unique, wet rotor motor uses significantly less energy than a direct drive counterpart, and the 3300 gph capacity of this pump is great for medium sized waterfalls. A screened base helps keep debris out of the 1.5" inlet, and three legs here elevate the item slightly off the base of your skimmer or pond. Attach a 1.5" MNPT fitting to the threaded outlet for a direct line from the pump to your water feature, or use the included elbow for versatility in situating your tubing. The thermoplastic chassis remains durable for many seasons of use, while the small footprint is simple to place in a variety of skimmers or water features. Power a biofilter, stream, or other aquatic accent using this Magnetic Drive Waterfall Pump. One year warranty.
Note: Per the manufacturer, this product, Little Giant item number 517251, is the replacement for Cal Pump item number PWM3900.
Pump Performance
Use this chart to determine the proper size pump for your pond. The height of the water outlet above the surface of the pond is called the Head Height. Gallons Per Hour (GPH) represents the maximum amount of water your pump is capable of pushing at a given Head Height. To ensure the pump's best possible performance, reduce frictional losses by using the largest diameter hose possible.
| Head Height (in feet) |
Gallons per Hour |
| 0' | 3300 |
| 1' | 3240 |
| 5' | 2700 |
| 10' | 1380 |
| 12.7' | shutoff |
Model Number: PWM 3900
Dimensions: 5.75" dia. x 10"H, 20'L cord
Pump Outlet: accepts 1.5" MNPT fittings
Maximum Head: 12.7' shut-off
Maximum Flow: 3300 gph
Power: 280 Watts, 2.4 amps
Voltage: single-phase, 115V
Mfg. Warranty: 1 year warranty
Brand: Little Giant
Item Number: LIG-517251
Availability: Temporarily out of stock. Available soon.
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Shipping Weight: 14 lbs
SRP: $461.99 Your Price: $309.99 Free Shipping
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