Winterizing Your Hot Tub: A Step-by-Step Guide to DIY Drain, Clean, and Protect

As the cold months approach, protecting your hot tub from freezing temperatures becomes essential. Winterizing your hot tub prevents damage to the plumbing and equipment, saving you costly repairs and ensuring it’s ready for use when warmer weather returns. This guide walks you through the process of draining, cleaning, and winterizing your hot tub using a sump pump and shop vac, so you can confidently prepare your spa for winter on your own.

Sump pump draining water from hot tub

Preparation Before Winterizing

Start by ensuring safety and convenience for the entire process:

• Turn off power to the hot tub at the breaker to avoid electrical hazards.

• Remove the cover and take out any spa filters to access the interior.

• Check that your sump pump hose is long enough to reach a safe drainage area where water won’t cause damage or flooding.

  
  

Taking these steps first sets the stage for a smooth winterizing process.

How to Drain the Hot Tub Using a Sump Pump

Draining the water completely is crucial to prevent freezing inside the tub and plumbing lines.

1. Attach the drainage hose securely to the sump pump.

2. Place the other end of the hose in a location where water can safely run off, such as a garden or drain.

3. Position the sump pump at the deepest point on the hot tub floor to remove as much water as possible.

4. Plug in the sump pump and let it run until the water level is very low.

5. Watch the pump carefully to avoid running it dry, which can damage the motor.

6. When the pump no longer removes water, unplug it and lift it out.

   
   

This method efficiently removes most of the water, preparing your hot tub for cleaning.

Cleaning the Hot Tub Interior

Cleaning removes dirt, oils, and buildup that can cause damage or odors during winter storage.

• Use a shop vac or bucket to remove any remaining puddles of water.

• Spray the entire interior with a spa-safe cleaner or a mixture of warm water and vinegar.

• Let the cleaner sit for 10 to 15 minutes to loosen grime.

• Scrub all surfaces gently with a soft brush or non-abrasive sponge to avoid scratching.

• Rinse thoroughly with clean water to remove all cleaning residue.

• Vacuum out the rinse water using your wet-dry vacuum.

• Don’t forget to clean the filter compartment and skimmer areas where dirt often hides.

• Remove the filters and wash them with a filter cleaner or spray them with a hose. Let them dry completely before storing.

  
  

Thorough cleaning helps maintain your hot tub’s condition and prevents mold or mildew buildup during winter.

Cleaning hot tub interior with soft brush

How to Winterize the Hot Tub Plumbing Using a Shop Vac

Water left in plumbing lines can freeze and cause cracks or damage. Removing this water is essential.

1. Switch your shop vac to “blow” mode.

2. Blow air into each jet, one at a time, for several seconds. This pushes water out of the plumbing lines and back into the tub.

3. Switch the shop vac to “suction” mode.

4. Vacuum up all the water that was forced out.

5. Repeat the blow and suction steps for each jet until no more water comes out.

   
   

This process clears the plumbing lines of water, protecting your hot tub from freeze damage.

Final Tips for Winterizing Your Hot Tub

• Store your hot tub cover in a dry place or use a cover protector to extend its life.

• Keep the hot tub unplugged and covered throughout winter.

• If you live in an area with extreme cold, consider adding antifreeze designed for spas to plumbing lines as an extra precaution.

• Check your hot tub periodically during winter to ensure the cover is secure and no water has accumulated.

  
  

Winterizing your hot tub yourself saves money and gives you peace of mind knowing it’s protected.