Informational Guide

How To Drain a Dehumidifier Outside

Draining a dehumidifier outside is an easy task. We teach you all the dos and do nots in this comprehensive guide.

by Josh M

It’s essential that you drain your home dehumidifier often so that it runs at its best potential. Otherwise, the unit will struggle against the water stored inside of it.

If you want to improve the efficiency of your dehumidifier, make sure to read the rest of this guide! You’ll learn how to drain dehumidifiers to the outside.

You’ll want to connect the dehumidifier to a hose so it drains without you having to move it constantly. You also need to first make sure to put the unit on a pedestal and place it close to a drain or where you can reach the outside.

Here are the steps:

  1. Find the hose connector and wrap it with Teflon tape to secure the hose
  2. Make sure the unit still has proper airflow
  3. Put the unit on a raised surface for gravity flow
  4. Use a level on the top of the unit
  5. Use a condensate pump if you have to extend the hose further
  6. Connect the second hose
  7. Make sure it drains outdoors

2 Ways To Drain A Dehumidifier Outside

Gravity Draining

Gravity draining works well in the basement, especially if you have any drains on the floor. To set it up, use the following steps:

  1. Locate the drain port on the back of your dehumidifier
  2. Unscrew the plug there
  3. Attach a hose to the drain port
  4. Set up with floor drain or use condensate pump to move water upwards

This setup does require that your basement has a floor drain. It uses gravity, so the hose needs to be facing down from the main unit. Most brands of garden hose also fit dehumidifiers, making them a great option for this method.

To drain outside, you’ll need to use an external condensate pump. The pump allows the water to travel upwards, where you can position it outside your basement window.

Built-in Pump Draining

A dehumidifier with a built-in pump doesn’t require that you empty it. Instead, the machine empties itself when it detects that it’s full. This option is also great for basements, as well as other rooms in the home. The pump is already in the unit, so you can place it anywhere.

  1. Locate the drain port on the back of your dehumidifier
  2. Unscrew the plug there
  3. Attach a hose to the drain port and set the end outside

You have a few less steps with this option, as you don’t have to set up another pump. However, make sure to read the manual you’re given so that you know exactly how the built-in pump works.

Dehumidifier with a Black Hose for Draining

Why Is My Dehumidifier Not Draining Through The Hose?

The connected hose should be draining water from the unit without you having to do anything. If it’s not, you’ll want to determine what’s going wrong.

First, make sure the garden hose is connected properly. It can become loose, so you may need to tighten it. If the hose is old, you’ll also want to consider replacing it- the hose might be backed up with water that can’t travel through.

Next, unplug the unit, then plug it back in, and finally restart it. Doing so resets the dehumidifier, which could help it correct any issues that it was having internally.

Dehumidifier Continuous Drain Option

Can I Drain My Dehumidifier Into a Sump Pump?

Sump pumps are found in the basement. They remove water from your home and are in the bottom of your basement flooring. The pumps determine the water levels and drain the moisture out of the home.

You can drain your dehumidifier into a sump pump by simply setting the hose over the hole in your basement’s floor. This process makes dehumidifiers very easy to use in the basement.

Here’s how to set it up:

  1. Turn off the unit and unplug it
  2. Place the unit on a cement block or shelf in your basement
    It must be higher than the pump
  3. Locate the drain port and attach the hose
  4. Position the hose so it’s above the sump pump and water can flow into it naturally

People Also Ask (FAQ)

Can I drain a dehumidifier into a toilet?

You can drain the dehumidifier water into the toilet’s tank, if you’re worried about wasting water. That way, the water is used next time you flush and can serve another purpose.

How long does it take to drain a dehumidifier?

That depends on the size of the unit and how much water it can hold. It’s best to allow the dehumidifier to drain until no more water comes out- even small drops. It could take 10 to 15 minutes to do this manually, which is why people attach the hose.

How often do you need to drain a dehumidifier?

You need to do this often. Make sure to empty your dehumidifier once a day. When it’s really humid outside, you should drain it two times per day.


Attaching a dehumidifier to a hose is very beneficial. You won’t need to worry about the appliance overfilling with water- allowing it to run at its highest potential.

Last Updated on August 10, 2021

Josh M

My name is Josh and I am obsessed with the HVAC industry. I created this website to help HVAC techs of all levels get the best out of their heating & cooling systems. I have spent thousands of hours studying air conditioners, heaters and home air products so you can learn & buy with confidence. Learn more about the team here.