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Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S
Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S
Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S
Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S
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Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S

Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S

Type: Filter

SKU: HTT-6473-164S

Barcode: 850511004734

$35.95
$35.95
Shipping calculated at checkout.

The Hot Tub Things® Inner Filter (Part #HTT-6473-164S) is a premium replacement filter designed specifically for Sundance® 880 and 850 Series hot tubs manufactured between 2009 and 2025. This inner filter works in tandem with your outer filter to provide superior water filtration, ensuring crystal-clear, healthy spa water every time you soak.

Engineered to OEM specifications, this filter captures fine debris, oils, and contaminants that can cloud your water and strain your spa's circulation system. Whether you're maintaining a Sundance® Cameo, Optima, or Majesta model, this inner filter delivers reliable performance and long-lasting durability.

Frequently Bought Together
Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S

Hot Tub Things® Inner Filter – Compatible with Sundance® 6473‑164S

$35.95
$35.95

  • Provides a direct replacement for the OEM Sundance® MicroClean® Ultra inner filter—densely spun-bound polyester microfiber media captures ultra-fine particles and preserves spa clarity.

  • Compatible with Sundance® 880 Series (2009–2023) and 850 Series (2005–2023), including Altamar, Capri, Cameo, Majesta, Marin, Maxxus, Optima, Aspen, Claremont, and Lisbon models.

  • Fully fits original part #6473‑164S—aka AK‑6473164 or SD‑01293—in Dual‑Stage MicroClean® Ultra setups; outer filter sold separately.

  • Dimensions are approximately 18.74″ length × 5.63″ diameter, with open 2.75″ top and bottom holes for precise installation.

  • Non-washable; replace every 3–6 months based on usage to maintain optimal water clarity and avoid strain on spa components.

  • Quick, tool-free installation—remove existing inner filter, insert fresh one, and replace the compatible outer filter for full performance restoration.

Key Features & Benefits

Perfect Fit Guaranteed

Designed exclusively for Sundance® 880/850 Series spas (2009–2025)

High-Efficiency Filtration

Captures particles as small as 10–15 microns for cleaner, clearer water

Durable Construction

Made from premium filter media that resists chemicals, UV exposure, and wear

Easy Installation

Drop-in replacement—no tools or modifications required

Extends Equipment Life

Reduces strain on pumps and heaters by keeping water clean

Cost-Effective Maintenance

Affordable alternative to OEM filters without sacrificing quality

Frequently Asked Questions

  • No. It is non-washable and recommended for replacement every 3–6 months.
  • Compatible with Sundance® 850 and 880 Series (2005–2023), including major models like Altamar, Capri, Cameo, Maxxus, Optima, and more.
  • Yes—the inner filter works as part of a two-stage MicroClean® Ultra system and requires the outer filter (6473-165S) for optimal performance.

Fast, Free Shipping

Orders over $100 ship free anywhere in the continental U.S.

Competitive Pricing

Premium products at prices that make sense and reasonable.

Authorized Reseller

100% genuine, factory-approved OEM — never aftermarket knockoffs.

Satisfaction Guaranteed

We stand behind every product with 30 days to return.