Search Your Hot Tub Model
Search the model of your hot tub to see if we carry the filter you need. Some filter manufacturers list filter compatibility by the entire series, so you may need to search by series title.
Caldera Spas
Caldera 73722 Filter Cartridge
- Utopia Cantabria — Q3 2014–2026
- Utopia Elation 2009–2010
- Utopia Florence 2018–2026
- Utopia Geneva GEB 2005–2026
- Utopia Niagara NIB 2005–2026
- Utopia Tahitian 2005–2026
- Aquatic Melodies Aspire 2005–2008
- Aquatic Melodies Elation 2005–2008
For 2014 Cantabria spas, confirm the production quarter. This cartridge is for Q3–Q4 production; Q1–Q2 uses 74817.
Caldera Aventine 74148 Filter Cartridge
- Vacanza Aventine 2010–2026
- Highland Aventine AVH 2006–2009
Fitment Note: For a 2019 Aventine, contact us with the spa serial number to confirm the filter.
Caldera Cantabria 74817 Filter Cartridge
- Utopia Cantabria 2009–Q2 2014
Fitment Note: For 2014 Cantabria spas, confirm the production quarter. Q3–Q4 production uses 73722.
Caldera Paradise 73532 Filter Cartridge
- Utopia Ravello 2022–2026
- Paradise Kauai 2000–2026
- Paradise Martinique 2000–2026
- Paradise Makena 2024
- Highland Cascade 2000
- Highland Cumberland 2002–2009
- Highland San Gabriel 2008–2009
- Highland Teton 2000
Fitment Note: For a 2024 Makena, confirm the spa serial number before ordering. Other Makena years use a different cartridge.
Caldera Utopia 73531 Filter Cartridge
- Utopia Geneva GEB 2000–2004
- Utopia Hawaiian HAB 2001–2002
- Utopia Niagara NIB 2000–2004
- Utopia Provence 2018–2021
- Utopia Tahitian 2000–2004
- Paradise Geneva GEA 2000–2004
- Paradise Hawaiian HAA 2000–2010
- Paradise Makena MAA 2013–2023, 2025–2026
- Paradise Moorea 2006–2010
- Paradise Niagara NIA 2000–2002
- Paradise Reunion 2019–2026
- Paradise Salina 2011–2026
- Paradise Seychelles 2019–2026
- Paradise Tahitian TAA 2000–2005
- Highland Cascade 2001–2003
- Highland Olympia 2000–2009
- Highland Palomar 2004–2005
- Highland Teton 2001
- Aquatic Melodies Aspire 2004
- Aquatic Melodies Elation 2003–2004
- C-Series C30 2006–2009
- C-Series C30S 2006–2009
- C-Series C45 2006–2009
- C-Series C45S 2006–2009
Fitment Note: For a 2004 Hawaiian HAA or a 2024 Makena, contact us with the spa serial number before ordering.
Caldera Vacanza 76136 Filter Cartridge
- Vacanza Marino 2010–2026
- Vacanza Palatino 2010–2026
- Vacanza Vanto 2011–2026
Caldera 31489 Filter Cartridge
- Vacanza Celio 2019–2026
- Vacanza Tarino 2013–2026
Hot Spring Spas
Hot Spring 71827 Filter Cartridge
- Limelight Bolt 2012–2017
- Limelight Flair 2008–2017
- Limelight Glow 2008–2017
- Limelight Pulse 2008–2017
- Tiger River Bengal M 1997–2010
- Tiger River Bengal MM 2005–2010
- Tiger River Caspian CHP 2004–2010
- Tiger River Caspian CPN 2003
- Tiger River Khyber L 1994–1996
- Tiger River Manora MH 1996
- Tiger River Manora M 1992–1996
- Tiger River Siberian L 1997–2004
- Tiger River Sumatran N 1997–2010
- Tiger River Tondi N 1992–1994
- Tiger River Tondi PH 1996
- Tiger River Tondi P 1995–1996
- Hot Spot La Palma 2008–2009
- Hot Spot Relay 2010–2026
- Hot Spot Rhythm 2011–2026
- Hot Spot Tempo 2010–2019
Hot Spring Gleam 77004 Filter Cartridge
- Limelight Gleam 2013–2017
Hot Spring Highlife 71825 Filter Cartridge
- Highlife Classic F 1990–2000
- Highlife Classic FH 1990–1996
- Highlife Grandee G 1990–2007
- Highlife ILE 2003
- Highlife K 1990–1996
- Highlife Jetsetter J 1990–2010
- Highlife Jetsetter JJ 2006–2018
- Highlife Jetsetter JJN 2019–2026
- Highlife Landmark S 1995–2003
- Highlife Prodigy HN 2019–2026
- Highlife Prodigy H 1990–2018
- Highlife Sovereign ILE 2002
- Highlife Sovereign I 1990–2010
- Highlife Sovereign IH 1994–1996
- Highlife Sovereign II 2004–2013
- Highlife Summit R 1995–1996
- Highlife Triumph TRHN 2019–2022
- Highlife Vanguard V 2001–2007
- Highlife Vanguard VV 2005–2013
- Hot Spot Pace 2020–2026
- Hot Spot RE Z 1998–2002
- Hot Spot RLX Z 1998–2002
- Hot Spot SE 1998–2000
- Hot Spot SLX 1998–2002
- Hot Spot SLXtra 2001–2002
- Hot Spot Stride 2019–2026
- Hot Spot SX 2011–2026
- Hot Spot TX 2011–2026
- Solana RX 2003–2009
- Solana SX 2003–2010
- Solana TX 2003–2010
- Solana Tx X 2000–2002
Fitment Note: Use this pleated cartridge only where the spa specifies 71825 or its listed equivalent. Models requiring Tri-X cartridges must use the appropriate Tri-X filter.
Hot Spring Limelight 78161 Filter Cartridge
- Limelight Beam BMI 2018–2026
- Limelight Beam BMII 2018–2026
- Limelight Flair 2018–2026
- Limelight Flash 2018–2026
- Limelight Pulse 2018–2026
Hot Spring Prism 78286 Filter Cartridge
- Limelight Prism 2018–2026
Hot Springs Tri-X 79435 Filter Cartridge
- Highlife Accolade 2005–2006
- Highlife Aria AR 2007–2018
- Highlife Aria NXT 2017–2026
- Highlife Classic F 1990–2000
- Highlife Envoy KK 2004–2018
- Highlife Envoy NXT 2014–2026
- Highlife Grandee G 1990–2007
- Highlife Grandee GG 2005–2018
- Highlife Grandee NXT 2014–2026
- Highlife ILE 2003
- Highlife Jetsetter J 1990–2010
- Highlife Jetsetter JJ 2006–2018
- Highlife Jetsetter JJN 2019–2026
- Highlife Jetsetter LX JTN 2014–2026
- Highlife Landmark S 1995–2003
- Highlife Prodigy HN 2019–2026
- Highlife Prodigy H 1990–2018
- Highlife Sovereign IIN 2019–2026
- Highlife Sovereign ILE 2002
- Highlife Sovereign I 1990–2010
- Highlife Sovereign II 2004–2018
- Highlife Triumph TRHN 2019–2022
- Highlife Vanguard NXT 2017–2026
- Highlife Vanguard V 2001–2007
- Highlife Vanguard VV 2005–2018
- Highlife Vista / Summit SS 2004–2013
Endless Pool
Endless Pool 77728 Swim Spa Filter Cartridge - 2 Pack
- R120, R200 and R500 — swim-spa filter compartment
- X200 and X500 — swim-spa filter compartment
- X2000 — swim side only
- E500, E550 and E700 — swim-spa filter compartment
- E2000 — swim side only
Fitment Note: Confirm the spa serial number and existing cartridge before ordering. X2000 and E2000 models use a different filter in the separate spa compartment.
Endless Pool Filter 77931
- X2000 — separate spa compartment only
- E2000 — separate spa compartment only
Fitment Note: Confirm the spa serial number and existing cartridge before ordering. This is not the swim-side filter.
Unicel
Find Your Replacement Cartridge
The easiest way to confirm if a Unicel filter is the right replacement for your OEM filter is to reach out to our friendly customer service team for expert guidance.
Alternatively, if you have your filter’s dimensions handy, you can visit Unicel’s website to compare them with the Unicel filter you’re considering—ensuring a perfect match with ease! Click here: Unicel Fitment Guide
Unicel C-7350
- Utopia Ravello 2022–2026
- Paradise Kauai 2000–2026
- Paradise Martinique 2000–2026
- Paradise Makena 2024
- Highland Cascade 2000
- Highland Cumberland 2002–2009
- Highland San Gabriel 2008–2009
- Highland Teton 2000
- Hot Spot Sorrento 2003–2009
Fitment Note: For a 2024 Makena, confirm the spa serial number before ordering. Other Makena years use a different cartridge.
Unicel C-8399
- Utopia Cantabria Q3 2014–2026
- Utopia Elation 2009–2010
- Utopia Florence 2018–2026
- Utopia Geneva GEB 2005–2026
- Utopia Niagara NIB 2005–2026
- Utopia Tahitian 2005–2026
- Aquatic Melodies Aspire 2005–2008
- Aquatic Melodies Elation 2005–2008
Fitment Note: For 2014 Cantabria spas, confirm the production quarter. This cartridge is for Q3–Q4 production; Q1–Q2 uses 74817.
Unicel C-8300
- Utopia Cantabria 2009–Q2 2014
Fitment Note: For 2014 Cantabria spas, confirm the production quarter. Q3–Q4 production uses 73722.
Unicel C-7375
- Utopia Geneva GEB 2000–2004
- Utopia Hawaiian HAB 2001–2002
- Utopia Niagara NIB 2000–2004
- Utopia Provence 2018–2021
- Utopia Tahitian 2000–2004
- Paradise Geneva GEA 2000–2004
- Paradise Hawaiian HAA 2000–2010
- Paradise Makena MAA 2013–2023, 2025–2026
- Paradise Moorea 2006–2010
- Paradise Niagara NIA 2000–2002
- Paradise Reunion 2019–2026
- Paradise Salina 2011–2026
- Paradise Seychelles 2019–2026
- Paradise Tahitian TAA 2000–2005
- Highland Cascade 2001–2003
- Highland Olympia 2000–2009
- Highland Palomar 2004–2005
- Highland Teton 2001
- Aquatic Melodies Aspire 2004
- Aquatic Melodies Elation 2003–2004
- C-Series C30 2006–2009
- C-Series C30S 2006–2009
- C-Series C45 2006–2009
- C-Series C45S 2006–2009
- Hot Spot Mallorca 2003–2009
Fitment Note: For a 2004 Hawaiian HAA or a 2024 Makena, contact us with the spa serial number before ordering.
Unicel C-4335
- Vacanza Aventine 2010–2026
- Highland Aventine AVH 2006–2009
Fitment Note: For a 2019 Aventine, contact us with the spa serial number to confirm the filter.
Unicel C-8465
- Vacanza Marino 2010–2026
- Vacanza Palatino 2010–2026
- Vacanza Vanto 2011–2026
- Limelight Bolt 2012–2017
- Limelight Flair 2008–2017
- Limelight Glow 2008–2017
- Limelight Pulse 2008–2017
- Tiger River Bengal M 1997–2010
- Tiger River Bengal MM 2005–2010
- Tiger River Caspian CHP 2004–2010
- Tiger River Caspian CPN 2003
- Tiger River Khyber L 1994–1996
- Tiger River Manora MH 1996
- Tiger River Manora M 1992–1996
- Tiger River Siberian L 1997–2004
- Tiger River Sumatran N 1997–2010
- Tiger River Tondi N 1992–1994
- Tiger River Tondi PH 1996
- Tiger River Tondi P 1995–1996
- Hot Spot La Palma 2008–2009
- Hot Spot Relay 2010–2026
- Hot Spot Rhythm 2011–2026
- Hot Spot Tempo 2010–2019
Unicel C-6430
- Highlife Classic F 1990–2000
- Highlife Classic FH 1990–1996
- Highlife Grandee G 1990–2007
- Highlife ILE 2003
- Highlife K 1990–1996
- Highlife Jetsetter J 1990–2010
- Highlife Jetsetter JJ 2006–2018
- Highlife Jetsetter JJN 2019–2026
- Highlife Landmark S 1995–2003
- Highlife Prodigy HN 2019–2026
- Highlife Prodigy H 1990–2018
- Highlife Sovereign ILE 2002
- Highlife Sovereign I 1990–2010
- Highlife Sovereign IH 1994–1996
- Highlife Sovereign II 2004–2013
- Highlife Summit R 1995–1996
- Highlife Triumph TRHN 2019–2022
- Highlife Vanguard V 2001–2007
- Highlife Vanguard VV 2005–2013
- Hot Spot Pace 2020–2026
- Hot Spot RE Z 1998–2002
- Hot Spot RLX Z 1998–2002
- Hot Spot SE 1998–2000
- Hot Spot SLX 1998–2002
- Hot Spot SLXtra 2001–2002
- Hot Spot Stride 2019–2026
- Hot Spot SX 2011–2026
- Hot Spot TX 2011–2026
- Solana RX 2003–2009
- Solana SX 2003–2010
- Solana TX 2003–2010
- Solana Tx X 2000–2002
- Vacanza Celio 2019–2026
- Vacanza Tarino 2013–2026
Fitment Note: Replaces compatible 71825 or 31489 pleated cartridges. Models requiring Tri-X cartridges must use the appropriate Tri-X filter.
Unicel C-6350
- Limelight Beam BMI 2018–2026
- Limelight Beam BMII 2018–2026
- Limelight Flair 2018–2026
- Limelight Flash 2018–2026
- Limelight Pulse 2018–2026
Unicel C-8326
- 850 Maxxus, Cameo and Optima 2002–2004
- 850 Altamar, Marin and Capri 2002–2005
- 850 Majesta 2005
- 880 Maxxus, Cameo and Optima 2005
- 850E Caprio and CaprioST 2002–2005
- Metro 2004–2005
- Portofino Tango 2002–2003
Fitment Note: For compatible pre-2006 Sundance filter systems requiring an internal core block/plug. C-8326 contains that plug; C-8327 does not. Match the existing cartridge and filter assembly before ordering.
Unicel C-8327
- 880 Series 2006–2023 — using a compatible original horizontal filter system
- 980 Claremont and Kingston 2017–2025 — as a one-piece alternative to the original MicroClean Ultra assembly
- 980 Lisbon and Odessa — confirm the original assembly before substituting
- 780 Series, except Solo, 2007–2025 — with the original horizontal filter assembly
- 780 Bahia, Cayman and Palermo 2006
- 780 Caprio and CaprioST 2006–2007
- Metro 2006–2007
- Select Constance and Victoria 2011–2018 — with the original filter assembly
- Later Maxxus or Cambria models retaining the original filter system — confirm the installed assembly
Fitment Note: For compatible 2006-and-newer Sundance filter systems that do not require an internal core block/plug. This is a one-piece pleated alternative, not an inner or outer MicroClean cartridge. It does not fit MicroClean Ultra II, Ultra II Lite or MicroClean Mini systems.
Bullfrog Spas
Bullfrog A / R / X Series 10-00282 Filter Cartridge
- Bullfrog A Series 2018-2022
- Bullfrog R Series 2018-2022
- Bullfrog X Series 2018-2026
- Earlier compatible A, R and X Series spas — only when equipped with Filter Core Cage & Cap Assembly for Bullfrog Spas
Fitment Note: Coreless cartridge; the correct filter cage and cap must be installed. 2023-and-newer A Series models use Simplicity flat filters.
Bullfrog STIL Series 10-00281 Filter Cartridge
- Bullfrog STIL Series 2018–2026
- Bullfrog STIL Series 2015–2017 — when fitted with Filter Core Cage & Cap Assembly for Bullfrog Spas
Bullfrog Simplicity™ Flat Filters for M Series
- Bullfrog M Series 2020-Current
- Bullfrog Swim Series 2020-Current
- Bullfrog A Series 2023-Current
Fitment Note: Coreless cartridge; the correct filter cage and cap must be installed.
Freeflow Spas
Freeflow Spas 78459 Filter Cartridge
- Freeflow Mini FFS 2015–2025
- Hot Spring Freeflow Mini MIN 2026
Sundance Spas
Sundance® Spas 6473-165S Outer Filter Series 880
- 880 Series 2009–2023 — with the original MicroClean Ultra system
- 980 Claremont and Kingston 2017–2025 — with the original MicroClean Ultra system
- 980 Lisbon and Odessa — match the original MicroClean Ultra assembly
- Later Maxxus or Cambria models retaining the original MicroClean Ultra system — match the installed cartridge
- Older 850/880 models already converted to MicroClean Ultra — confirm the installed inner and outer part numbers
Fitment Note: Outer cartridge only. Use with 6473-164S inner cartridge. Does not fit the newer MicroClean Ultra II system.
Sundance® Spas 6473-164S Inner Filter Series 880
- 880 Series 2009–2023 — with the original MicroClean Ultra system
- 980 Claremont and Kingston 2017–2025 — with the original MicroClean Ultra system
- 980 Lisbon and Odessa — match the original MicroClean Ultra assembly
- Later Maxxus or Cambria models retaining the original MicroClean Ultra system — match the installed cartridge
- Older 850/880 models already converted to MicroClean Ultra — confirm the installed inner and outer part numbers
Fitment Note: Inner cartridge only. Use with 6473-165S outer cartridge. Does not fit the newer MicroClean Ultra II system.
Sundance® Spas 6541-397S Complete Filter Series 880
- 880 Series 2009–2023 — with the original MicroClean Ultra system
- 980 Claremont and Kingston 2017–2025 — with the original MicroClean Ultra system
- 980 Lisbon and Odessa — match the original MicroClean Ultra assembly
- Later Maxxus or Cambria models retaining the original MicroClean Ultra system — match the installed cartridge
- Older 850/880 models already converted to MicroClean Ultra — confirm the installed inner and outer part numbers
Fitment Note: Complete original MicroClean Ultra filter set: 6473-165S outer cartridge and 6473-164S inner cartridge. Does not fit the newer MicroClean Ultra II system.
Sundance® Spas 6540-488S Filter
- 850 Maxxus, Cameo and Optima 2002–2004
- 850 Altamar, Marin and Capri 2002–2005
- 850 Majesta 2005
- 880 Maxxus, Cameo and Optima 2005–2008
- 880 Altamar, Majesta, Marin and Capri 2006–2008
- 880 Series 2009–2023 — with the original MicroClean Ultra system
- 980 Claremont and Kingston 2017–2025 — with the original MicroClean Ultra system
- 980 Lisbon and Odessa — confirm the original assembly before substituting
- 780 Series, except Solo, 2007–2025 — with the original horizontal filter assembly
- 780 Bahia, Cayman and Palermo 2006
- 780/850E Caprio and CaprioST 2002–2007
- Metro 2004–2007
- Portofino Tango 2002–2003
- Select Constance and Victoria 2011–2018 — with the original filter assembly
- Later Maxxus or Cambria models retaining the original filter system — confirm the installed assembly
Fitment Note: One-piece pleated alternative for the compatible original Sundance filter systems listed above. Replaces the complete compatible filter set, rather than one inner or outer cartridge. Does not fit MicroClean Ultra II, Ultra II Lite or MicroClean Mini systems.
Sundance® Spas 6540-507S MicroClean® Filter Series 880
- 880 Maxxus, Cameo and Optima 2005–2008
- 880 Altamar, Majesta, Marin and Capri 2006–2008
Fitment Note: MicroClean Plus one-piece cartridge. Replaces the earlier 6540-505 MicroClean II cartridge in compatible 2005–2006 880 models. For other models or a converted filter system, contact us with the spa serial number and existing cartridge number.
Sundance® Spas 6473-452S MicroClean Ultra II Outer Filter 880 Series
- 880 Altamar 2024–2026 — with MicroClean Ultra II
- 880 Aspen 2024–2026 — with MicroClean Ultra II
- 880 Cameo 2024–2026 — with MicroClean Ultra II
- 880 Capri 2024–2026 — with MicroClean Ultra II
- 880 Marin 2024–2026 — with MicroClean Ultra II
- 880 Optima 2024–2026 — with MicroClean Ultra II
- 880 Vistamar 2024–2026 — with MicroClean Ultra II
Fitment Note: Outer cartridge only. Use with 6473-453S inner cartridge. For 2024 spas, confirm the installed system before ordering; early-production and carryover models can use the previous filter design.
Sundance® Spas 6473-452S MicroClean Ultra II Outer Filter 880 Series
Sundance® Spas 6473-453S MicroClean Ultra II Inner Filter 880 Series
- 880 Altamar 2024–2026 — with MicroClean Ultra II
- 880 Aspen 2024–2026 — with MicroClean Ultra II
- 880 Cameo 2024–2026 — with MicroClean Ultra II
- 880 Capri 2024–2026 — with MicroClean Ultra II
- 880 Marin 2024–2026 — with MicroClean Ultra II
- 880 Optima 2024–2026 — with MicroClean Ultra II
- 880 Vistamar 2024–2026 — with MicroClean Ultra II
- 780 Bristol, Chelsee, Dover, Hamilton and Montclair 2026 — when equipped with MicroClean Ultra II Lite
Fitment Note: Inner cartridge only. The 880 system uses outer cartridge 6473-452S. The 2026 780 Ultra II Lite system uses a different outer cartridge, 6473-608S. For 2024 spas, confirm the installed system before ordering; early-production and carryover models can use the previous filter design.
Sundance® Spas 6473-453S MicroClean Ultra II Inner Filter 880 Series
Sundance® Spas 6541-964S MicroClean Ultra II Series 880 Filter Complete Assembly
- 880 Altamar 2024–2026 — with MicroClean Ultra II
- 880 Aspen 2024–2026 — with MicroClean Ultra II
- 880 Cameo 2024–2026 — with MicroClean Ultra II
- 880 Capri 2024–2026 — with MicroClean Ultra II
- 880 Marin 2024–2026 — with MicroClean Ultra II
- 880 Optima 2024–2026 — with MicroClean Ultra II
- 880 Vistamar 2024–2026 — with MicroClean Ultra II
Fitment Note: Complete MicroClean Ultra II filter set for the listed 880 models: 6473-452S outer cartridge and 6473-453S inner cartridge. The 2026 780 Ultra II Lite system uses a different complete assembly. For 2024 spas, confirm the installed system before ordering; early-production and carryover models can use the previous filter design.
Sundance® Spas 6541-964S MicroClean Ultra II Series 880 Filter Complete Assembly
Sundance® Spas 6541-965S Filter Series 880
- 880 Altamar 2024–2026 — with MicroClean Ultra II
- 880 Aspen 2024–2026 — with MicroClean Ultra II
- 880 Cameo 2024–2026 — with MicroClean Ultra II
- 880 Capri 2024–2026 — with MicroClean Ultra II
- 880 Marin 2024–2026 — with MicroClean Ultra II
- 880 Optima 2024–2026 — with MicroClean Ultra II
- 880 Vistamar 2024–2026 — with MicroClean Ultra II
Fitment Note: One-piece pleated alternative for the listed 880 MicroClean Ultra II systems. Replaces the complete compatible filter set; it is not the two-piece MicroClean Ultra II assembly. For 2024 spas, confirm the installed system before ordering; early-production and carryover models can use the previous filter design.
Sundance® Spas 6473-249S MicroClean Outer Filter
- 680 Alicia 2023–2026 — with MicroClean Mini
- 680 Edison 2023–2026 — with MicroClean Mini
- 680 McKinley 2023–2026 — with MicroClean Mini
- 680 Peyton 2023–2026 — with MicroClean Mini
- 680 Prado 2023–2026 — with MicroClean Mini
- 680 Ramona 2023–2026 — with MicroClean Mini
Fitment Note: Outer cartridge only. Use with 6473-283S inner cartridge. For 2023 spas, confirm the installed filter system before ordering. Early-production spas can use the older 373045S cartridge.
Sundance® Spas 6473-283S MicroClean Inner Filter
- 680 Alicia 2023–2026 — with MicroClean Mini
- 680 Edison 2023–2026 — with MicroClean Mini
- 680 McKinley 2023–2026 — with MicroClean Mini
- 680 Peyton 2023–2026 — with MicroClean Mini
- 680 Prado 2023–2026 — with MicroClean Mini
- 680 Ramona 2023–2026 — with MicroClean Mini
Fitment Note: Inner cartridge only. Use with 6473-249S outer cartridge. For 2023 spas, confirm the installed filter system before ordering. Early-production spas can use the older 373045S cartridge.
Sundance® Spas 6541-468S Filter Series 680
- 680 Alicia 2023–2026 — with MicroClean Mini
- 680 Edison 2023–2026 — with MicroClean Mini
- 680 McKinley 2023–2026 — with MicroClean Mini
- 680 Peyton 2023–2026 — with MicroClean Mini
- 680 Prado 2023–2026 — with MicroClean Mini
- 680 Ramona 2023–2026 — with MicroClean Mini
Fitment Note: One-piece pleated alternative for the listed MicroClean Mini systems. Replaces the compatible inner-and-outer filter set; this is not a two-piece MicroClean Mini assembly. For 2023 spas, confirm the installed filter system before ordering. Early-production spas can use the older 373045S cartridge.
Sundance® Spas 6540-501S MicroClean Filter
- 850 Maxxus, Cameo and Optima 2002–2004
- 850 Altamar, Marin and Capri 2002–2005
- 850 Majesta 2005
- 780 Series, except Solo, 2007–2025 — with the original horizontal filter assembly
- 780 Bahia, Cayman and Palermo 2006
- 780/850E Caprio and CaprioST 2002–2007
- Metro 2004–2007
- Portofino Tango 2002–2003
- Select Constance and Victoria 2011–2018 — with the original filter assembly
Fitment Note: Reusable lower pleated cartridge for the original two-part MicroClean system. Use with the matching disposable upper microfilter and required adapter. Select Series configurations may specify upper filter 6540-089; match the existing assembly. Does not fit 2026 780 Ultra II Lite systems.
Sundance® Spas 6540-502S Spun Bound Filter
- 850 Maxxus, Cameo and Optima 2002–2004
- 850 Altamar, Marin and Capri 2002–2005
- 850 Majesta 2005
- 780 Series, except Solo, 2007–2025 — with the original horizontal filter assembly
- 780 Bahia, Cayman and Palermo 2006
- 780/850E Caprio and CaprioST 2002–2007
- Metro 2004–2007
- Portofino Tango 2002–2003
- Select Constance and Victoria 2011–2018 — only when the installed assembly specifies 6540-502
Fitment Note: Disposable upper microfilter for the original two-part MicroClean system. Use with 6540-501S lower cartridge and the required adapter. If the existing upper filter is 6540-089, confirm the correct replacement before ordering. Does not fit 2026 780 Ultra II Lite systems.
Sundance® Spas 373045S Filter
- 680 Burlington 2006–2007
- 680 Ramona and McKinley 2014–2022; early 2023 models with the original cartridge system
- 680 Peyton 2012–2022; early 2023 models with the original cartridge system
- 680 Edison 2013–2022; early 2023 models with the original cartridge system
- 680 Prado 2017–2022; early 2023 models with the original cartridge system
- 680 Alicia 2019–2022; early 2023 models with the original cartridge system
- 680 Denali — 2006 and later models equipped with the original 373045-style cartridge system
- Prado 5 — confirm the installed 373045-style cartridge and spa serial number
Fitment Note: For the original small vertical-cartridge filter system. Does not replace the newer MicroClean Mini filters. For 2023 production or a modified spa, confirm the cartridge number and filter housing before ordering.
About the Filter Fitment Guide
Finding the right spa filter is important for keeping your hot tub water clean, clear, and easy to maintain. Use this guide to search by your spa brand, model, and year to find the correct replacement filter without guessing or ordering the wrong cartridge.
We carry both OEM filters and Unicel aftermarket filters for many major spa brands, including Hot Spring, Caldera, Sundance, Bullfrog, Freeflow, Endless Pools, and more. If your brand or model is not listed, contact us with your spa’s brand, model, year, and serial number, and our service team can help match the right filter.
