Yes. The 2020 and newer Arctic Spa Frontier Custom Series is confirmed compatible with Spa Filter Adapter Kit v3. This fitment statement applies to that year/series and its matching stock Pro Filter setup—not every spa that has ever carried the Frontier name.
What Kit v3 changes on the Frontier
The stock Progressive Pro Filters are sealed proprietary depth-media cartridges. Owners replace those complete cartridges; they cannot open the media pack and rinse it as a normal maintenance procedure.
Kit v3 changes the filter connection so the supported Frontier can use affordable reusable generic filters. Those filters remove easily, rinse between the pleats, and can be cleaned and reused through multiple maintenance cycles.
- The original Pro Filter covers stay in use.
- Kit v3 supplies the adapter hardware.
- Compatible reusable filters are required and sold separately.
- The adapter does not modify the pump, heater, controller, or plumbing outside the filter interface.
How to confirm a Frontier before ordering
- Confirm the spa is an Arctic Spas Frontier.
- Confirm the model year is 2020 or newer.
- Confirm it is the Custom Series, not a different series that reused a model name.
- When the year or series is undocumented, compare the original filter-cover top with the reference in the full compatibility guide.
The matching cover has the rounded black insert, center divider, and mirrored inward-pointing angular openings shown in the guide. A known 2020+ Frontier Custom Series does not need an extra guess-based test; the photo is the physical confirmation for an undocumented or modified setup.
The older Frontier generations covered in the Frontier legacy specifications guide are not included in this compatibility statement.
What arrives and what you buy separately
| Item | Included? |
|---|---|
| Kit v3 adapter hardware | Yes |
| Compatible reusable filter cartridges | No—required and sold separately |
| Original Pro Filter covers | No—reuse the covers already on the spa |
The Kit v3 product page lists the compatible filter numbers. Use those exact specifications rather than buying by appearance.
Maintenance after conversion
- Turn off spa power before removing filters.
- Remove the reusable generic cartridges from the adapter setup.
- Rinse between the pleats with a normal garden-hose stream.
- Use a cartridge-filter cleaner only as its label directs, then rinse completely.
- Inspect pleats, bands, and end caps before reinstalling.
- Replace a cartridge when it tears, separates, stays loaded after cleaning, or no longer supports normal flow.
Do not use a pressure washer. Reusable means the cartridge supports repeated cleaning; it does not mean the filter lasts forever.
Why a spare reusable set helps
A second compatible set lets you keep the Frontier filtered while the first set is being deep-cleaned and dried. Rotate only clean, undamaged cartridges, and label the sets so both receive the same inspection and maintenance. This is a convenience of the reusable path, not a reason to extend a damaged filter beyond its serviceable life.
Filter Not Present is expected
Kit v3 does not emulate the proprietary filter-detection signal. The topside Filter Not Present message remains expected after conversion. That display message is separate from an actual FLO/FLC/ER flow fault.
Investigate further when circulation is weak, heating stops, a separate code appears, pump behavior changes, or water quality declines. The adapter does not repair pumps, sensors, valves, heaters, wiring, or controllers.
Order Kit v3 for the Arctic Spa Frontier
For a confirmed 2020+ Frontier Custom Series, order Spa Filter Adapter Kit v3 and purchase the compatible reusable filters listed on the product page. Filters are required and sold separately.
Canadian owners: Review the Canada guide for compatible cartridge numbers, USD pricing, shipping, and import details.
Arctic Spa Frontier Kit v3 FAQs
Does Kit v3 fit a 2020+ Arctic Spa Frontier?
Yes. The 2020 and newer Frontier Custom Series is on the confirmed Kit v3 compatibility list.
Can I rinse the original Progressive Pro Filters?
No. They are sealed replacement cartridges. Kit v3 is the path that enables removable, rinseable, reusable generic filters.
Are the generic filters included?
No. Kit v3 includes adapter hardware. The compatible filters are required and sold separately.
Will the Filter Not Present message disappear?
No. It remains expected because Kit v3 does not emulate the stock filter-detection signal.
Does compatibility include older Frontier hot tubs?
No. The confirmed statement is for the 2020+ Frontier Custom Series with the matching filter setup.
References
This is an independent aftermarket owner resource. Spa Filter Adapter is not affiliated with, endorsed by, or approved by Arctic Spas. Product and maintenance claims are separated by system and tied to the sources below.