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About Spa Filter Adapter

Ryan Kunz, founder and product designer of Spa Filter Adapter
Ryan KunzFounder and Product Designer

Hi, I’m Ryan Kunz. Thanks for visiting Spa Filter Adapter.

I currently own an Arctic Spa Summit XL, and I love it. The issue for me was always the filtration system. With a family of six using the spa, the stock filters just were not cleaning the water efficiently enough for us, and I was replacing them about every two months.

Paying for proprietary replacement filters every couple of months got old fast. I wanted a more practical filter option for my own Summit XL, so I sat down, measured the existing setup, and started designing one.

What began as a solution for my own hot tub became Spa Filter Adapter Kit v3 after I realized other Arctic Spa owners were dealing with the same problem.

Ryan Kunz's Arctic Spa Summit XL hot tub
The Summit XL that started itMy Arctic Spa Summit XL at home.
About 20 yearsOwning and maintaining home pools and hot tubs.
Three major versionsWith hundreds of smaller design refinements leading to Kit v3.
Made by meI personally manufacture, 3D print, and assemble the adapter kits.

Designed from firsthand experience

I have owned and cared for pools and hot tubs for about 20 years. That includes water chemistry, filtration, cleaning, routine maintenance, and the normal troubleshooting that comes with keeping a spa ready to use.

Spa Filter Adapter was not designed as a generic accessory based only on measurements from a screen. It came from owning and maintaining my Summit XL and wanting a better filter option for a spa my family actually uses.

Side profile of the Spa Filter Adapter design in Fusion 360
Adapter side profileA side-profile view of my adapter design in Fusion 360.

How Kit v3 was developed

I use AutoCAD and Fusion 360 to design functional parts around real dimensions, tolerances, fitment, and operating constraints. There have been three major versions of the adapter, but reaching Kit v3 took hundreds of smaller revisions and refinements.

Each change had a purpose, whether it was improving fit, strength, assembly, or everyday use. My goal has always been simple: make a well-designed product that solves the problem without making the filter system more complicated.

Spa Filter Adapter design shown in Fusion 360
Designed in Fusion 360A Spa Filter Adapter CAD design from the refinement process.

Made and assembled by the designer

I personally manufacture, 3D print, and assemble the Spa Filter Adapter kits. Keeping the design and manufacturing work together gives me direct control over how the product is made and lets me improve it based on firsthand experience.

Spa Filter Adapter parts on Ryan Kunz's 3D printer bed
Adapters on the printer bedA batch of Spa Filter Adapters on my 3D printer bed.

A little more about me

My primary business is professional digital marketing, but I have always enjoyed designing functional products and solving practical problems. Spa Filter Adapter brings those skills together with years of pool and hot tub ownership.

I also review the technical guides published on this site for practical accuracy. When a guide relies on an Arctic Spas manual or another technical source, I want that information linked clearly so owners can check it for themselves.

I appreciate you taking the time to learn about the product. If you are trying to determine whether Kit v3 fits your spa, start with the compatibility guide. If you still have questions, contact me and I’ll help however I can.

Ryan Kunz
Founder and Product Designer

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Spa Filter Adapter is an independent aftermarket product. SpaFilterAdapter.com is not affiliated with, endorsed by, or approved by Arctic Spas or its manufacturers.