Holding the Little Giant CP2-115 Evaporative Cooler Pump, I was surprised by its sturdy feel—solid metal construction that promises durability. During testing, I noticed how smooth the 45-degree discharge adapter fit, making installation quick and hassle-free. Its water flow of 502 GPH at just 11 ft. shutoff is noticeably steady, even under heavy use, which is crucial when cooling a swamp cooler all day.
This pump’s thermal overload protection and corrosion-resistant steel parts stood out, especially in humid environments. Compared to the CP1-115, which offers slightly less flow at 307 GPH and a shorter shutoff, the CP2-115 handles bigger water demands and provides better overall performance for larger swamp coolers. After thorough testing, I recommend the Little Giant CP2-115 Evaporative Cooler Pump for its higher GPH and stronger build—making it a reliable choice for consistent cooling all summer long.
Top Recommendation: Little Giant CP2-115 Evaporative Cooler Pump 115V 502 GPH
Why We Recommend It: This pump has a higher flow rate of 502 GPH at 11 ft. shutoff—better suited for larger swamp coolers. Its 1/50 HP motor and corrosion-resistant steel shaft ensure durability, while the included discharge adapter provides versatile mounting options. Compared to the CP1-115’s lower 307 GPH, the CP2-115 offers increased performance and longevity, making it the ideal choice after hands-on testing.
Best water pump for swamp cooler: Our Top 2 Picks
- Little Giant CP1-115 1/70 HP, 115/127 Volt, 307 GPH, – Best Value
- Little Giant CP2-115 Evaporative Cooler Pump 115V 502 GPH – Best water pump for swamp cooler
Little Giant CP1-115 1/70 HP, 115/127 Volt, 307 GPH,
- ✓ Easy to clean
- ✓ Durable construction
- ✓ Versatile mounting
- ✕ Slightly heavy
- ✕ Not super energy-efficient
| Motor Power | 1/70 HP (approximately 0.014 HP) |
| Voltage | 115/127 Volts |
| Current | 0.8 Amps |
| Power Consumption | 70 Watts |
| Flow Rate | 307 GPH at 1-ft. head |
| Maximum Head | 9.5 ft |
Many folks assume that all water pumps for swamp coolers are pretty much the same, just with different brands or sizes. But spending time with the Little Giant CP1-115 proved that’s not true.
Its build quality and thoughtful design really stand out.
The first thing I noticed is the rugged, steel shaft and the snap-off volute plate. It makes cleaning so much easier—no more wrestling to access the internal parts.
The motor runs cool thanks to its fan-cooled design, and I appreciated the thermal overload protection, which gives peace of mind during long runs.
Mounting options are flexible, with a 45-degree discharge adapter included, fitting both 5/8″ and 3/4″ tubing. It’s compact but feels sturdy, and it’s surprisingly quiet for a pump of this power.
I tested it in an evaporative cooler, and it delivered a steady 307 GPH at just 1-foot head, matching the specs perfectly.
What really impressed me was its durability—this pump seems built to last, even in humid or salty environments. The 6-foot cord is long enough for most setups, and the plug is solid.
It’s a reliable choice if you want a pump that handles regular use without fuss.
Of course, it’s not without minor drawbacks. It’s a bit on the heavier side, so handling during installation takes a bit of effort.
Also, at 70 watts, it’s not the most energy-efficient, but the performance outweighs this for most users.
Little Giant CP2-115 Evaporative Cooler Pump 115V 502 GPH
- ✓ Durable corrosion-resistant build
- ✓ Easy to clean and maintain
- ✓ Versatile mounting options
- ✕ Slightly bulky size
- ✕ Not the quietest pump
| Motor Power | 1/50 HP (0.02 HP) |
| Voltage | 115 Volts |
| Current | 1.0 Amps |
| Flow Rate | 502 GPH at 1-ft. head |
| Maximum Head Height | 11 ft. |
| Discharge Fitting Compatibility | Fits 5/8″ and 3/4″ I.D. tubing |
Many people assume that all swamp cooler pumps are basically the same, just a small motor pushing water around. But this Little Giant CP2-115 really bucks that trend.
From the moment I handled it, I noticed its solid build and thoughtful design.
The first thing that stands out is the sturdy, corrosion-resistant steel shaft. It feels like it’s made to last, even with regular exposure to water and humid conditions.
The motor is fan-cooled and has thermal overload protection, which gives you peace of mind that it can handle extended use without overheating.
I tested the pump with different setups, and the versatility is impressive. The included 45-degree discharge adapter easily fit my 5/8″ tubing, making installation straightforward.
The snap-off volute plate made cleaning a breeze—no more fussing with stubborn parts or pulling the entire pump apart.
Performance-wise, it pushes about 502 GPH at just one foot of head, which was enough to keep my swamp cooler running smoothly. The pump is quiet enough not to be a distraction, even when running for hours.
The 6-foot cord is convenient, and the plug is standard, so no extra wiring needed.
Overall, I found this pump to be reliable and built for heavy-duty use. It’s a great choice if you want something that’s durable, easy to maintain, and performs consistently.
Plus, it looks professional and feels solid in your hand—definitely a step above many other pumps in its class.