Cleaning / Replacing the Spa Filter

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The spa filter is the part of your spa that removes the debris from the water and needs to be cleaned on a regular basis to maximize your spa’s filtering performance and heating efficiency.  When the spa operates without a filter, there is a possibility that debris may be sucked into the plumbing through the filter well.


Spa Filters

We recommend you clean your filter about once a month,
depending on your spa usage and bather load.

In addition to spraying off the filter weekly to remove surface debris, your filter should be deep cleaned periodically to dissolve scale and particles that get lodged deep within the filter fibers and impede the filtration process. Even if the filter looks clean, scale and particles can clog the fibers and prevent water from flowing through the filter resulting in the most common spa problem—no heat, caused by a dirty filter.

 WARNING!  Be sure to shut off power to the spa before you remove the filter.

  1. Remove the filter by turning it counterclockwise, unscrewing the bottom threads, then pulling it up and out.
  2. Place the dirty filter into a bucket of water deep enough to cover the filter.
  3. Add 8 oz of liquid filter cleaner to the bucket of water.
  4. Soak the filter for a minimum of 24 hours.
  5. Spray the filter with a water hose. Spray each pleat carefully.
  6. Reinstall the filter. Do not overtighten.

Note: It is a good idea to keep a spare filter to use in the spa while the dirty filter is being deep cleaned. This way, you can rotate the filters and both will last longer.


Replacing FiltersWe recommend you replace your filter about once a year, depending on your spa usage and bather load. Before you place a new filter in your spa, make sure you remove the plastic wrapper. Soak the filter a minimum of 24 hours before you insert it in the filter well.

To ensure you order the correct replacement filter, Cal Spas has developed an easy measuring guide for all filters. Follow the directions below to replace your existing filter with a diligent spa filter which will last months longer than competitors.

Never use a filter too small for your spa’s water capacity!

How to measure Spa Filters

If you need a replacement filter visit    Need Spa parts - Visit us at

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