Hot tubs are easy to maintain, but they aren’t maintenance-free. Cleaning and changing your tub’s filter is an important part of keeping the water in your hot tub fresh and healthy. Depending on use, most hot tub filters should be replaced every 12 months. That may sound like a difficult job, but it’s really not. 

Hot tubs are designed to be regularly maintained by their owners. Putting off the job can create a health hazard and potentially cause damage to your hot tub.

Why Should I Change My Hot Tub Filter?

The filter in a hot tub catches any debris and grime left in the water. It works by pumping the water through the filter. The porous material of the filter allows water to flow through while it traps large and small impurities. Most filters can hold on to particles as small as 20 microns. That’s about the size of a single mold spore. 

If it seems like trapping such small bits of debris is unnecessary, think of all the lotion residue, body oils, and dead skin cells that are left behind each time you use your hot tub. 

As the filter becomes clogged with debris, it is less able to clean the water properly. In addition to leaving you with unsanitary water, a dirty filter may cause a strain on the unit’s pump and lead to damage. 

When changing your filter, be certain to use the filter brand recommended by your tub’s manufacturer. Cheap or poorly made filters won’t do a good job and could end up costing you a lot more in the long run. 

Signs Your Hot Tub Filter Needs Changing

working hot tub filter

Replacing the filter yearly should be enough, but there are signs your filter could need changing more often. Watch for the following warning signs:

  • The water isn’t clear
  • The filter is visibly cracked or leaking
  • You can no longer get the filter clean, even with a thorough cleaning
  • The filter seems to get blocked easily and needs frequent cleanouts
  • Water flow is restricted

Always consult your tub’s maintenance handbook and follow the manufacturer’s instructions. 

4 Easy Steps of Filter Replacement

Changing a filter on your Sundance® Spa takes just four simple steps. Before starting, make sure to shut off the power source to your hot tub.

1. Remove the Housing Lid

Lift the lid from the housing assembly. It is the large round or rectangular lid most likely located in the corner of the top wall of your tub. Check your owner’s manual if you’re not sure about the location. 

Twist or lift the lid to remove it. Make sure to set it in a safe place so it doesn’t get stepped on or tripped over while you’re working. 

2. Remove the Filter

Unscrew the locking ring by turning it to the left. Look for the nut on the right side of the housing. Turn it clockwise to loosen it. Grab the filter and gently move it a fraction of an inch to the right. Now it should lift straight out.  

While the filter housing is empty, clean out the compartment with a hose. 

3. Replace the Filter

Insert a new filter into the compartment. Put it back into place, setting the filter slightly toward the right, then pushing it gently into place. Tighten the nut and return the lid. Turn the power source back on. 

4. Run the Spa

Turn the hot tub on and let it run for 5 to 10 minutes to confirm the filter fits properly and is operating smoothly. 

Tips for Keeping Hot Tub Water Clean

clean water in hot tub

You can reduce the amount of maintenance necessary for your hot tub by following a few easy rules. First, always keep the cover on your hot tub when it’s not in use. A cover prevents debris, insects, and small animals from getting into the tub as well as helping to regulate the temperature. 

Second, showering before entering the tub will reduce the amount of product residue, sweat, and skin cells that end up floating in your hot tub water. 

Third, regular cleaning of your hot tub filters will help them work better and last longer. In most cases, hot top filters should be removed and hosed off with plain water every seven to fourteen days. 

Lastly, don’t skip the water changes. For ultimate function, a hot tub should be emptied, thoroughly cleaned, and refilled with fresh water about every two to three months depending on use. 

Find More Help at New England Spas

The pros at New England Spas are here to help. Call us if you have more questions about replacing your Sundance® Spa filter or if you need to stock up on your hot tub maintenance supplies.