How to Drain and Clean a Hot Tub

October 24, 2022
Gray hot tub with seating and jets against gray-brown composite siding.

A hot tub can be a great addition to any home, providing a relaxing space to unwind after a long day. However, you must keep your hot tub clean and well-maintained to prevent the growth of bacteria and algae. 


In addition, dirty hot tubs can damage the pump and filtration system. Luckily, draining and cleaning your hot tub is relatively easy. This comprehensive guide will take you through all the steps.


Why You Need to Drain Your Hot Tub


Over time, your hot tub will become filled with all sorts of organic contaminants like body oils, lotions, cosmetics, hair products, and sweat. These contaminants can cause skin irritation, eye irritation, and respiratory problems. 


They can also lead to the growth of bacteria and other microorganisms like mold or mildew. These can be quite dangerous to your health. You'll remove these contaminants by draining the water and cleaning the surfaces. You'll keep your hot tub safe and healthy for everyone to enjoy.


When Should You Drain Your Hot Tub


As a general rule of thumb, you should drain and clean your tub about four times a year. However, you may need to clean the hot tub more often depending on how often you use it. Here are some signs that the time has come to drain and replace the water:


  • The water is cloudy or contains debris
  • The water has a strong chlorine smell
  • The pH levels are out of balance
  • The water is starting to look scummy


If you note any of these conditions, take action and clean your tub before using it.



How to Drain a Hot Tub


For most people, draining the hot tub is easier with the drain plug. Start by switching off the power. Locate yours on the side of your hot tub, unscrew it, and remove any filter cartridges. Attach a garden hose and allow the water to start draining out. 


Depending on the size of your hot tub, this process can take a few hours. If you're in a hurry, consider using a sump pump. To use a sump pump, simply place it in the hot tub and let it do its job. This method is typically faster than the drain plug. 


Never drain your hot tub water into a storm drain. Those lead to natural bodies of water. Use your outdoor sewer system or run the hose in a utility sink inside the house.


How to Clean a Hot Tub


Remove the filter from the housing, and rinse it off with a hose. If the filter is very dirty, you may need to soak it in a bucket of filter-cleaning solution. If your filter is damaged or missing parts, replace it. 


Cleaning the hot tub shell is important for both aesthetic and functional reasons. Use a non-abrasive cleaner and a soft sponge or cloth for best results. Avoid using harsh chemicals, as they can damage the finish of your hot tub. For stubborn stains, use a soft brush or abrasive pad. Be sure to rinse the area well after cleaning to remove any residue.


How to Refill a Hot Tub


First, insert the hose into the filter compartment. Then, turn on the spigot and let the water run into the tub. Once the tub is full, start it up and add any chemicals you use — such as sanitizer or bromine tablets. 


Finally, test the water to ensure it's at the right temperature, alkalinity, and pH level. Cover the tub for about 24 hours for all the chemicals to circulate before using it.


Draining and cleaning your hot tub regularly is essential for maintaining it. Luckily, the process is relatively easy. Simply follow the steps outlined in this guide, and you'll have your hot tub back up and running in no time.

Person enjoying a tranquil outdoor hot tub, promoting relaxation and personal well-being.
By Keith Patridge September 2, 2026
Find a trusted hot tub dealer in Black Forest, CO, with Wellis Hot Tubs of Colorado. Local delivery, expert install & ongoing service. Request a quote.
Premium hot tub experience with bubbling water and picturesque mountain scenery.
By Keith Patridge September 2, 2026
Choosing a hot tub store in Castle Rock, CO? See why local beats online for delivery, permits & warranty support. Call Wellis Hot Tubs of Colorado today.
Outdoor hot tub surrounded by nature, offering relaxation, comfort, and a spa-like experience.
By Keith Patridge September 2, 2026
Find the right hot tub business in Castle Rock, CO. Wellis Hot Tubs of Colorado offers local service and white-glove delivery. Call today.
lady stood by hot tub in store looking at catalogue.
August 10, 2026
Planning a hot tub install in Castle Rock, CO? Learn what to expect from a local hot tub store. Wellis Hot Tubs of Colorado guides you. Get a quote!
Modern spa displayed by a trusted hot tub supplier for home relaxation.
August 10, 2026
Local hot tub supplier serving Black Forest, CO. Expert guidance, local delivery & warranty service from Wellis Hot Tubs of Colorado. Get a free quote.
Outdoor hot tub with light blue water on a patio beside greenery and pink flowers
August 4, 2026
Find the right hot tub dealer in Westminster, CO with Wellis of Colorado. Expert guidance, American-made spas & local support. Call today!
Outdoor hot tub filled with bubbling water on a wooden deck beside tall decorative plants.
April 23, 2026
Discover why Wellis Hot Tubs of Colorado is the hot tub store Castle Rock, CO, trusts for year-round wellness. Call 303 495-2279 or click here to learn more!
An elderly couple relaxes happily inside a tiled hot tub.
December 9, 2025
Discover why selecting a reliable hot tub business in Castle Rock, CO ensures long-term value with Wellis Hot Tubs of Colorado. Click here to keep reading!
Hot tub with moving water.
December 3, 2025
Discover why choosing a hot tub store in Castle Rock, CO, is a smart decision for quality and service. Click here to explore with Wellis Hot Tubs of Colorado!
Woman relaxing in hot tub, mountain backdrop, sunny day.
August 1, 2025
Explore the hot tub business in Castle Rock, CO, with Wellis Hot Tubs of Colorado. Call 303-495-2279 to upgrade your lifestyle with expert support!