Avenli/Bestway/SaluSpa/Coleman Inflatable Hot Tub — Type VI Filter Adapter

The Problem

The Avenli Vermont inflatable hot tub ships with a filter cartridge (marked "Type 2") that doesn't quite fit standard sizing, it has a smaller bore and different ring placement. Replacements are harder to source, more expensive, and limited in options.

The Solution

This 3D printed adapter lets you use a widely available Type VI filter cartridge in your Avenli hot tub with no modifications to the tub required, it just screws on the existing nozzles. Type VI filters are stocked at most pool and spa retailers and are significantly cheaper and easier to source than the original cartridge.

How It Works

The adapter threads directly into the M62×3 filter housing on the tub and accepts a standard Type VI cartridge. It consists of a threaded barrel and a locking flange that work together to create a secure fit.

Print Settings

• Material: PETG or ASA recommended due to chemical and UV resistance

  • Avoid PLA, it will degrade quickly

• Infill: 20%+ recommended for thread strength

• Supports: Required on the base

Notes

• Verify your hot tub's filter housing threads are M62×3 before printing

• Tested on the Avenli Vermont 17654US

• Type VI filters are available at most pool supply shops and department stores

• Optional 3mm spacer available for some filters that are slightly smaller.

Compatibility

Confirmed: Avenli Vermont 17654US.

Other Avenli / Bestway inflatable hot tubs with M62×3 filter housings may also be compatible — drop a comment if it works for your model!

Why I Made This

Replacement filters for these tubs are surprisingly hard to find. Type VI filters are on the shelf at most stores. This adapter makes maintenance much easier and cheaper to run the hot tub. If it saves you a headache, give it a like.