Best Sump Pump for Dehumidifier Tank

Damp basements or crawl spaces are a common problem for homeowners in high humidity areas. Rain or groundwater that seeps into the soil can also penetrate your basement foundation or crawl space, leading to stagnant water and damp floors and walls. To prevent mold growth, it is crucial that you get rid of any standing water and excess moisture in the space. These are only a few reasons you need a high-capacity dehumidifier.

Dehumidifiers can collect gallons upon gallons of water from a heavily moist basement. It can be a hassle to drain this amount of water manually. Most dehumidifiers offer multiple options for draining the water collected. To make the process more convenient, you can have your dehumidifier hose hooked up to your sump pump system. 

Drainage Options

Dehumidifiers work by extracting excess moisture from the air. In high humidity areas, they can collect gallons of water per day. The total amount of water your dehumidifier collects in a day depends mainly on the size and condition of the room. In most cases, you have these three options for draining water from your dehumidifier:

Dehumidifier Tank

Residential dehumidifiers, by default, collect the moisture extracted from the air in an internal water reservoir. For standard compressor dehumidifiers, the capacity of this bucket is only a portion of the maximum moisture removal capacity of the unit. 

Depending on your settings and the dehumidifier capacity and tank size, manual draining may be the easiest option for you. You simply remove the tank and throw out the water or save it for later use. Many dehumidifiers feature an automatic shut-off that turns off the dehumidifier automatically when the water bucket is full, along with a “Full Bucket” indicator light to inform you when you need to empty the water. 

How to Drain Water Tank

Once the tank is full and the dehumidifier is shut off, the unit will only resume operation once you empty the water and replace the tank. Slide out the water tank from its place, usually on the bottom front or side of the unit. Remove the tank cover or lid and pour the water into the sink, drain, or collect it in a bigger bucket to water your plants later. Rinse the tank with water or wash it with liquid soap if necessary. Wipe it down and place it back into the dehumidifier. 

Dehumidifier Bucket

The tank size of dehumidifiers varies greatly between different brands and models. Peltier dehumidifiers typically have a tank large enough to hold at least two days up to a week’s worth of moisture. However, refrigerant and desiccant dehumidifiers have a smaller tank size than moisture removal capacity, which means you may have to manually empty the tank multiple times a day. For more information on dehumidifier tank sizes, you can read this article.

While it’s a fairly simple task, not everyone has the time to remove the bucket and manually drain the dehumidifier water three or four times a day, especially if you’re using the unit in your basement. In this case, you’ll need to set up one of the following automatic drainage systems.

Drain Hose

If you don’t want to have to remove and replace your dehumidifier’s tank to empty the water multiple times a day, the simplest way to drain the water is by using a drain hose. A few brands may include this in your purchase along with a drainage adapter, but usually, all you’ll need is a standard garden hose. 

How to Use Drain Hose

To enable gravity drainage, firstly, place the dehumidifier on a flat and steady surface with a low-level drain nearby. Locate the drain port, usually at the back or on the side of the unit. Unscrew the drain plug or cap and attach the adapter if needed, then insert the drain hose. Position the other end of the hose toward the drain, directed downwards without any kinks or knots to obstruct the water flow. Most people use a floor drain for this, but, you can also place the unit on top of a counter and direct the hose to the sink.

BLACK+DECKER Dehumidifier with Drain Hose

Condensate Pump

While a drain hose may be good enough for some, an even more convenient way to drain your dehumidifier is through a condensate pump. This pump is designed to forcefully remove the condensate from a reservoir, produced in heating or cooling, refrigeration, or dehumidification. It’s commonly used with a high-capacity dehumidifier or central air conditioner when gravity drainage isn’t possible.

With a condensate pump, you don’t need to worry about the placement of your dehumidifier with respect to the drain. You can pump the water upwards into a sink or out of a window. Most pumps can push water vertically or horizontally up to 15 to 20 feet. This drainage option is ideal for basements or other large spaces where a floor drain is not available.

Built-in Pump

Most high-capacity dehumidifiers (40-pint or 50-pint and above) have a built-in pump version. A built-in condensate pump only needs one hose for drainage (usually included with the unit but different from the gravity drain hose) since the pump is already installed inside the machine. Usually, the internal pump can push the water up to 15-feet high. 

External Pump

However, for those units that do not include an internal condensate pump, or if you’d rather use the alternative, you can purchase an external condensate pump separately. This pump works for many dehumidifiers as well as other HVAC equipment. 

Little Giant VCMA-20ULS 115 Volt HP Automatic Condensate Removal Pump with Safety Switch

Can I Drain my Dehumidifier into a Sump Pump?

As you may do so with any machine that produces condensate, you can definitely drain your dehumidifier into a sump pump system. You can do this simply by connecting a hose from your dehumidifier drain outlet to your sump basin. 

A sump pump is essential for any home with a basement or crawl space that often suffers from water seepage, leaks, or floods. This submersible pump is installed inside a hole in the lowest point of the basement or crawl space where water accumulates. When the water inside this basin reaches a certain height, the pump will automatically drain water by pushing it out into an outdoor drainage system away from your house. 

For large portable dehumidifiers in your basement or crawl space and whole-house units that collect gallons of water per day, connecting them to your sump pump allows for worry-free continuous operation.

How to Install a Sump Pump Guide

How to Drain Dehumidifier into Sump Pump

If you already have a sump pump system installed in your basement or crawl space, draining your dehumidifier into it is a very simple process. 

First, make sure to turn off and unplug your dehumidifier, then place it higher than the drain hose and sump pump basin if you’re using gravity drainage. Attach a garden hose (or the included drain hose) to the dehumidifier drain outlet and run it to the sump pump inlet. 

In case your dehumidifier comes with a built-in pump, you can still drain the water collected into your sump pump if there is no other drain available in the area. Simply connect the drain hose to the dehumidifier outlet and direct it to your sump pump. When the dehumidifier reservoir reaches a certain level, the pump activates and discharges water into your sump pump basin.

When your pump moves the water outdoors, make sure that the water is released onto the ground downhill and away from the house and never back into the basement or crawlspace, and certainly not into the street or driveway. Another option is to pump the water into an underground discharge line far from the house.

On the other hand, if you do not have a sump pump system installed in your basement or crawlspace, then you should start looking into your options. Below is a list of small submersible sump pumps you can use to drain your dehumidifier water. Make sure to also add an electrical outlet where you can directly plug the pump.

Comparison Table for Best Small Sump Pump for Basement Dehumidifier

  • Dimensions: 12 x 7 x 7 inches
  • Max. Flow Rate: 1800 gallons
  • Weight: ‎6.8 pounds
View On Amazon →Read Our Review
  • Dimensions: 7.8 x 10.5 x 10.5 inches
  • Max. Flow Rate: 2680 gallons
  • Weight: 21 pounds
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  • Dimensions: 8 x 8 x 12 inches
  • Max. Flow Rate: 5490 gallons
  • Weight: 11 pounds
View On Amazon →Read Our Review
  • Dimensions: 9.5 x 7.5 x 6 inches
  • Max. Flow Rate: 2760 gallons
  • Weight: 17 pounds
View On Amazon →Read Our Review
  • Dimensions: 26.38 x 16.93 x 13.19 inches
  • Max. Flow Rate: 1.6 gallons
  • Weight: 42.8 pounds
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  • Dimensions: 23.2 x 15.2 x 17.7 inches
  • Max. Flow Rate: 198 pints
  • Weight: 67.2 pounds
View On Amazon →Read Our Review
  • Dimensions: 215.97 x 12.19 x 24.25 inches
  • Max. Flow Rate: 150 pints
  • Weight: 43 pounds
View On Amazon →Read Our Review

Best Small Sump Pump for Basement Dehumidifier

Superior Pump 91250 Sump Pump

Superior Pump 91250 Sump Pump

1/4 HP motor

1800 gallons per hour

12 x 7 x 7 inches

This thermoplastic submersible sump pump is a perfect fit for tight spaces while providing superior performance. The Superior Pump 91250 has a ¼ HP motor that moves water up to 1800 gallons per hour. It pumps out water up to 25 feet high.

This compact sump pump is built durable and long-lasting with a removable suction screen that can block particles up to ⅛-inch thick. It drains through a standard ¾ inch garden hose or a 1 ¼ inch NPT discharge hose. Additionally, a 10-foot power cord and a discharge connection compatible with many different applications are included. 

Zoeller M53 Mighty-Mate Sump Pump

Zoeller M53 Mighty-Mate Sump Pump

1/3 HP motor

2680 gallons per hour

7.8 x 10.5 x 10.5 inches

The Zoeller M53 sump pump is built with a cast-iron housing that can withstand harsh environments and a motor with thermal protection against overheating. It also has a thermoplastic base and polypropylene float switch that automatically activates the pump when water levels rise. 

This sump pump powerfully discharges a maximum of 2680 gallons of water per hour and can handle solids up to ½ inch thick to avoid clogging. Additionally, it comes with a 9-foot power cord.

Wayne Submersible Sump Pump ‎58321-WYN3

Wayne Submersible Sump Pump ‎58321-WYN3

3/4 HP motor

5490 gallons per hour

8 x 8 x 12 inches

This Wayne submersible sump pump has a powerful ¾ HP motor to help avoid flooding in your basement. It’s built with quality stainless steel and cast iron construction, minimizing airlocks and clogging with a top suction design.

The sump pump fits in basins 11 inches across or larger and installs easily in 15 minutes.

It can discharge water up to 5490 gallons per hour and reach up to 20-feet high. It drains through a 1-½ inch NPT discharge.

Little Giant 506160

Little Giant 506160

1/3 HP motor

2760 gallons per hour

9.5 x 7.5 x 6 inches

Little Giant is a popular brand of condensate pumps. For a small sump pump for your basement, the 50610 model is ideal. It is powered by a 1/3 HP motor with epoxy-coated cast iron housing oil-filled for lifetime lubrication and excellent heat dissipation. It also includes a polycarbonate cover and polypropylene base.

This compact sump pump has a maximum flow rate of 2760 gallons per hour. It can take in solids up to 3⁄16 inches thick and pumps water up to 18 feet high through its 1.5-inch FNPT discharge port.

Best Dehumidifiers with Built-in Pump

While a sump pump can be useful for many different HVAC equipment that produces condensate, a dehumidifier with a built-in pump may be more convenient than hooking your unit up to your sump pump. It is also much easier to install, as the pump is already inside the unit and all you have to do is plug and turn on your dehumidifier then connect it to a drain with the included drain hose.

Dehumidifiers with built-in pumps are also more energy efficient because they will automatically detect when to activate the pump. However, the main drawback of built-in pumps is their durability. In most cases for most brands, an internal condensate pump gives up much earlier than the unit itself. 

If you’d rather have a built-in pump for more convenience, some high-capacity dehumidifiers include this function for automatic drainage. Here are a few of the best dehumidifiers with internal pumps.

Frigidaire FFAP5033W1

Frigidaire FFAP5033W1

Frigidaire is a top-performing dehumidifier for residential use in almost every aspect. This Energy Star certified dehumidifier with a pump removes 50 pints of excess moisture per day and comes with a large water bucket capacity of 16.9 pints. This energy-efficient dehumidifier is known for quiet operation even in low temperatures without an auto defrost mode.

hOmeLabs HME020391N

hOmeLabs HME020391N

Another top-rated portable dehumidifier comes from hOmeLabs. This 50-pint dehumidifier also includes a built-in pump for mess-free draining in large basements up to 4,500 square feet. This Energy Star dehumidifier with a pump features almost anything you may need for your home while also saving on your energy bills.

AlorAir Sentinel HDi90 Dehumidifier

AlorAir Sentinel HDi90 Dehumidifier

If you need a professional-grade dehumidifier with a pump for your crawl space or any humid, narrow space in your home, then AlorAir is a good choice. The Sentinel HDi90 extracts up to 90 pints of excess moisture from a 2,200 square feet area. It also has an Energy Star rating and can be ducted to different parts of the house.

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