Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S

$47.95
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Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S
Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S
Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S
Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S
Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S
Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S

Hot Tub Things Outer Filter – Sundance 6540‑501S Compatible (75 Sq Ft, 2004–2024 Spas) – part #HTT‑6540‑501S

$47.95
Description
The Hot Tub Things HTT‑6540‑501S is a durable, washable outer replacement filter designed to match the OEM Sundance 6540‑501S. With 75 sq ft of filtration, it captures fine debris, supports dual-stage systems, and resurfaces cleaner spa water after a simple rinse. Tool-free and cost-effective.

Product Description

  • Premium replacement for Sundance® MicroClean® lower (outer) cartridge, compatible with OEM part 6540‑501S

  • Offers 75 sq ft filtration area using spunbound polyester media to capture fine debris for cleaner water

  • Dimensions match OEM: 8.5″ diameter × 14″ length, closed-top SAE threaded cap, open beveled 2.5″ bottom

  • Durable, washable design—rinse monthly to maintain performance, lasts multiple seasons

  • Compatible with OEM and aftermarket upper microfilter systems (e.g., 6540‑502, 6473‑165) in dual-stage setups

  • OEM cross-references: Unicel C-8380, Filbur FC-2810, Pleatco PSD85-2002, APCC7357, 18007, 80801

  • Easy tool-free install—slide in, restore water, and enjoy spa clarity

Product Specification

Brand Hot Tub Things
SKU HTT-6540-501S
Dimensions 8.43 x 14.72 x 8.39 in
Barcode 850511004741
Weight 3.77 lb

Product Compatibility

  • 2002 - 2007 Sundance® Spas CaprioST
  • 2002 - 2007 Sundance® Spas Caprio
  • 2004 - 2007 Sundance® Spas Metro
  • 2007 - 2025 Sundance® Spas Dover
  • 2007 - 2025 Sundance® Spas Montclair
  • 2007 - 2016 Sundance® Spas Certa
  • 2007 - 2025 Sundance® Spas Chelsee
  • 2007 - 2025 Sundance® Spas Hamilton
  • 2011 - 2018 Sundance® Spas Victoria
  • 2011 - 2018 Sundance® Spas Constance
  • 2006 - 2006 Sundance® Spas Bahia
  • 2006 - 2006 Sundance® Spas Cayman
  • 2006 - 2006 Sundance® Spas Palermo
  • 2002 - 2003 Sundance® Spas Tango

Filter Dimensions

Diameter 8.5"
Length 14"
Hole Size 2.5"
Sq. Ft 75
Replacement(s) FC-2810 PSD85-2002 C-8380

FAQ

Q: Which Sundance models does this fit?

A: Compatible with most Sundance 75 sq ft spas from 2004–2024, including 780, 880, 980, Hamilton, Chelsee, Montclair, Constance, and more.

Q: Is it reusable?

A: Yes—wash with garden hose monthly; reuse for multiple seasons before replacing.

Q: Does it require an inner filter?

A: Yes—it works as part of the dual-stage system; you need a microfilter (e.g. 6540‑502 or 6473‑165) on top.

Q: Is this an OEM product?

A: No, but it’s an exact-fit aftermarket alternative made to OEM specs at a lower price.

Directions

Turn off spa power and remove the existing filter assembly.

Slide out the old 6540‑501S cartridge.

Insert the HTT‑6540‑501S into the housing with threaded cap up.

Reinstall upper microfilter if applicable.

Restore water and power; run pump to clear air.

Rinse monthly; replace annually or as needed.

Customer Reviews

Based on 151 reviews
50%
(75)
50%
(76)
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E
Elliot H.
Good value

Excellent experience from ordering to installation. I’ll definitely be back.

C
Chris N.
Exceeded expectations

Outstanding quality and fast shipping. This product exceeded all expectations.

Q
Quinn J.
Solid product

High quality and simple to install. This is the kind of reliability I expect.

L
Leslie W.
Good value

Exactly what I needed. It works better than the original part that came with the spa.

A
Avery B.
Solid product

Outstanding quality and fast shipping. This product exceeded all expectations.

123

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