When a unit is installed at a lower elevation water condensation can build up and need to be pumped out.
Mini split condensate pumps are necessary anytime water can not be gravity fed out of a home.
There are many types of pumps from units that sit off to the side, to units that fit into the line-set.
Voltage can also be different so be sure to check your mini split manual or get a 115-volt unit that can plug into a wall outlet.
Most pumps are wired into the 115/220 voltage lines that run the inside wall unit.
Of course, be sure to read the manual or call a professional if needed.
Why Do Mini Split Systems Have Condensate?
All HVAC systems, including mini split kits, can have condensation depending on the humidity in the air.
Condensation will form when warm, humid air comes in contact with a cold surface, such as an air conditioning system.
If there is not any humidity in the air, no condensate will form, and no water will drip out.
If the air is humid, water will form on the evaporator and need to drip out of the unit.
Cold or dry climates will naturally have little to no humidity, while hot wet climates will have a lot of humidity.
Even dry climates can have rainy days when humidity levels rise, and water will drip out of a unit.
Why Do Mini Split Systems Need Condensate Pumps?
The majority of mini split systems can gravity feed any condensate water out of the unit.
The exception to this is when the unit is located below ground level and needs a water pump to get rid of the condensate.
This allows for the water to be pumped up and not drain into a home or other unwanted area.
How Do Mini Split Condensate Pumps Work?
A basic pump will have a reservoir the water can drip into.
Once a set point is reached in the reservoir, the pump will turn on and pump the water out.
There are variations in the look, voltage, wiring, and so on with the basic function to pump out any water formed by the condensation.
Below are some of our favorite picks for mini-split water pumps.
As always, be sure to read the reviews on Amazon, forums, or elsewhere to be sure a unit is a good fit for you.
*This post contains affiliate links.
Our Picks for the Best Mini Split Condensate Pumps
- Aspen Mini Lime
- Rectorseal 83939 Aspen Mini
- FUJIWARA Condensate Pump PC-320A
- Little Giant Condensate Pump
Aspen makes many good units, including the Mini Lime condensate pump, which is a popular unit that works very well in getting rid of water.
It is built to fit into a line-set cover with the main pump designed to fit into a 90-degree elbow.
The pump itself has a small reservoir that the condensation drips into, and once it becomes full, the pump turns on and pumps out the water.
It is a good system used by many to help get rid of water that drips from a mini split.
The hardest part would be running the drain line through the line-set outside without kinking it.
FUJIWARA makes this good simple pump that works well in many scenarios.
The unit is mounted on a wall below the mini split so water can drip into its reservoir.
The condensation line is fed into the unit and slowly fills up the reservoir.
Once it fills up the water is pumped outside through another water line.
This type of unit is mainly set up to work without the existing mini split wiring or lines.
A nice thing about FUJIWARA pumps is that they are quieter than many other units.
This small unit from Little Giant is a 115 volt 24 Amp pump.
It is a straightforward design that works well ins many scenarios; a small water pump is needed.
There are many different types of mini-split condensate pumps, all with different styles.
Many will fit directly into a line-set cover that holds everything packed into one location.
Other units are separate and sit off to the side, and are good for retrofit jobs.
Be sure to know the voltage you will be using. While most units will use 115 volts, it is best to know for sure before buying a pump.
Another thing to keep in mind is the water lines need to be run with no kinks, so the water is not blocked.
How quiet a pump is can also matter since some are noisier compared to others.