Spa & Hot Tub Filters


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FIL25-45D8H2MFT
  • Diameter: 4 3/4"
  • Length: 8 1/16"
  • Size: 40 Sq. Ft.
  • Thread: 2" MPT
Premium replacement for:
Pleatco: PMA20-F2M
0 reviews
Price: $50.74
FIL50-5D13H15FCT-3
  • Diameter: 5"
  • Length: 13"
  • Size: 50 Sq. Ft.
  • Thread: Female
Premium replacement for:
Pleatco: FIL50-5D13H15FCT-3
Filbur: FIL11100208
0 reviews
Price: $38.63
FIL50-5D13H2MFT-3
  • Diameter: 5"
  • Length: 12"
  • Size: 50 Sq. Ft.
  • Thread: 2" MPT
Premium replacement for:
Pleatco: FIL50-5D13H2MFT-3
Filbur: fil11100204
Unicel: 5CH-352
0 reviews
Price: $21.00
FIL50-5D13H2MFT-3
  • Diameter: 5 2"
  • Length: 13"
  • Size: 50 Sq. Ft.
  • Thread: 2" MPT
Premium replacement for:
Pleatco: FIL50-5D13H2MFT-3
Filbur: FIL11100205
0 reviews
Price: $21.00
FIL50-5D13H2OE-3
  • Diameter: 5"
  • Length: 13"
  • Size: 50 Sq. Ft.
  • Thread: Open
Premium replacement for:
Pleatco: FIL50-5D13H2OE-3
Filbur: FIL11100301
0 reviews
Price: $30.96
FIL75-5D145H2OE-3
  • Diameter: 5"
  • Length: 14 1/2"
  • Size: 75 Sq. Ft.
  • Thread: Open
Premium replacement for:
Pleatco: FIL75-5D145H2OE-3
Filbur: FIL11100233
Unicel: C-5374
0 reviews
Price: $40.66
Female replacing the filter of her calspas spa

Why your hot tub filter is important

Enjoy a warm, bubbly hot tub with crystal clear water that’s ready to be enjoyed whenever you want. Ensure your spa water remains clean and free of debris with a new spa filter.

Old filters can damage spas by causing pumps to work overtime and will cause spa water quality to decline profusely. When it comes to performance, the filtration system is at the heart of your spa’s function. Optimize your spa’s performance and water quality with a Cal Spas replacement filter.

Bio-Clean™ Antimicrobial Filters

Ban harmful microbes from your filter. Cal Spas Bio-Clean™ spa filters are infused with antimicrobial technology during the manufacturing process that becomes part of the molecular structure. With proper maintenance, Bio-Clean™ filters will have an added level of defense that keeps your filter clean and extend the functional lifespan.

HOW TO MEASURE YOUR SPA FILTER CARTRIDGES:

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.

Width

Using a tape measure, start at the edge of the end cap and measure across the widest point to the end of the opposite edge to find the deameter of your spa filter.

Length

Measure from outside of the end cap to the opposite end cap to find the total length of the filter.

Opening Diameter

Measure the opening of the filter by laying the fiter on its side. Measure the actual hold diameter, exclude the taper if any.

Please Note: Measurements of used filter may vary due to expansion or shrinkage while in the water. Please round to the nearest inch for accurate filter size.

Thred Types

Male threads must be distinguished between fine threads and coarse threads.

Female(Internal) Thread

Measure at the widest diameter, not including threads. A 1-1/2" nominal female coarse threaded fitting actually measures approx. 1-7/8" inside diameter (I.D.).

Male Thread

After identifying your thread type, determine the size of the thread by measuring the outside diameters at the widest point.

Fine Thread Measurements:

Normal Tread Size Measured O.D.
1-1/2" 1-7/8"
2" 2-1/4"

Coarse Thread Measurements:

Normal Tread Size Measured O.D.
1-1/4" 1-11/16"
1-1/2" 1-13/16"
2" 2-5/16"

Male Slip Fittings

Smooth, non-threaded male slip fittings can be found on cetain filters. To find the size, measure the overall outside diameter (O.D.) at the fitting's widest points.

Reading a Tape Measure

Tape measures are lined up with inch marks and fractioal lines. The scale between inch marks is divided into 1/16" increments. Theer are four different sized of lines between the inch marks. The longest line represents 1/2", the secondl longest 1/4", then 1/8" and finally 1/16".

Filter Maintenance Is Key

Keep your spa filters clean, rinse them off at least once a month to keep your spa filters functioning properly.

Pro tip: Rotate between two filters! When rinse off a dirty filter, replace with a clean spare to prevent your spa from circulating without a filter which can cause irreparable damage. This rotation method also helps extend the life span of your filters to dry completely will prevent odors and microorganisms from reproducing.

Best Filter Material

3.2 oz point bonded filtration fabric is constructed with millions of fiber strands to facilitate waater flow, hold more dirt and for an extended lifespan. The fine fiber allow this fabric to have larger cumulative wet surface area comapared to competitive brands. The special fabric allows the release of more dirt allowing spa owners to clean the filters easy and simple, resulting in better flow, less maintenance and longer cycle times between cleaning.

Core Construction

Our filter cores allow for the even flow of water through the entire cartridge which increases filtration and makes it easier for the pump to move water through the entire cartridge. Our filter cores are designed to be efficient, robustand save energy, money and the environment.

Indestructible Banding

Larger filters that require a banding will come standard with an Indestructible barnding material to prevent pleats from fluttering during water circulation. Our bands will ensure your spa will function properly to maintain your spa water sparkling clean.

Bio-Clean™ Antimicrobial Filters

Ban harmful microbes from your filter. Cal Spas Bio-Clean™ spa filters are infused with antimicrobial tectnology during the manufacturing process that becomes part of the molectular struture. With proper maintenance, Bio-Clearn™ filters will have an added level of defense that keeps your filter clean and extend the fuctional lifespan.