What is the Darlly replacement for Unicel C-6650?

Darlly 60505 replaces Unicel C-6650. Both are 6-15/16" in diameter and about 19-5/8" long.

What Darlly cartridge replaces Pleatco PSD50?

Darlly 60505 replaces Pleatco PSD50.

What size is Darlly 60505?

Darlly 60505 is 6-15/16" in outside diameter and 19-5/8" long, with 50 sq ft of filter area.

Darlly 60505 Spa Filter Cartridge

Replaces Unicel C-6650 · Pleatco PSD50 (discontinued) · Filbur FC-2725

Darlly 60505 is a 50 sq ft spa filter cartridge, 6-15/16" x 19-5/8". It replaces Unicel C-6650, Pleatco PSD50 (discontinued) and Filbur FC-2725.

Specifications

Darlly part number	60505
Outside diameter	6-15/16"
Length	19-5/8"
Top end cap	2-1/16" Open
Bottom end cap	2-1/16" Open
Filter area	50 sq ft
Type	Spa
Darlly description	Sundance Spas

Cross-reference

Brand	Part numbers Darlly 60505 replaces
Unicel	C-6650
Pleatco	PSD50 (discontinued)
Filbur	FC-2725

Questions

What is the Darlly replacement for Unicel C-6650?: Darlly 60505 replaces Unicel C-6650. Both are 6-15/16" in diameter and about 19-5/8" long.
What Darlly cartridge replaces Pleatco PSD50?: Darlly 60505 replaces Pleatco PSD50.
What size is Darlly 60505?: Darlly 60505 is 6-15/16" in outside diameter and 19-5/8" long, with 50 sq ft of filter area.

Where to buy Darlly 60505

Pool and spa businesses in Florida, Georgia, South Carolina, Alabama, Mississippi, Louisiana and Texas order through their Grit Game rep. Everywhere else, contact Darlly Filtration directly.

Find your Grit Game rep Contact Darlly Darlly 60505 on darllyfilter.com

Cross-reference checked October 21, 2026 against Unicel's 2026 Replacement Guide, Pleatco's catalog (updated September 2025), filbur.com and darllyfilter.com. A competitor number is listed only when that brand's own data pairs it with the same cartridge size. Always compare the size and end caps of your old cartridge before ordering.

Brand names and part numbers are trademarks of their respective owners and are shown only to identify compatible replacements. Darlly Filtration is not affiliated with or endorsed by them. Cross-reference by The Grit Game, Darlly's sales agency.