Unicel C-4440 Replacement Filter Cartridge | 40 Sq. Ft. | 16 3/4″ | Sundance Spas

Description

The Unicel C-4440 is a 4000 Series 40 sq. ft. replacement filter cartridge built for Sundance Spas filtration systems. Featuring 158 precision-folded pleats of 4 oz. Reemay 2040 polyester media across a 16 3/4″ profile, it delivers thorough debris capture and sustained water clarity between cleanings. The castle-style closed top cap and open bottom seat securely on your spa’s standpipe — no guesswork, no adapters.

⚠️ IMPORTANT: Some Sundance Spa Models Use Two Filter Cartridges
Certain Sundance Spas are equipped with a dual-filter system that requires two separate cartridges — this C-4440 (replaces Sundance 6540-495) and a second filter cartridge (Sundance 6540-497). If your spa uses both part numbers, you will need to order both filters for a complete service. The companion filter is the Unicel C-4305. Check your owner’s manual or existing cartridges for part numbers before ordering.

Specifications

Fits into:

(This is not an exhaustive list.)

Pro Tip: Before ordering, measure your existing cartridge end-cap to end-cap (16 3/4″) and confirm the outer diameter (4 5/8″) and top cap style (closed castle). Sundance filtration configurations vary by model year — verifying by OEM part number 6540-495 is the most reliable way to confirm fitment.

Also known as: C4440