What is the Darlly replacement for Unicel C-5346?

Darlly 50502 replaces Unicel C-5346. Both are 5-3/16" in diameter and about 14-1/8" long.

What size is Darlly 50502?

Darlly 50502 is 5-3/16" in outside diameter and 14-1/8" long, with 50 sq ft of filter area.

Darlly 50502 Spa Filter Cartridge

Replaces Unicel C-5346 · Filbur FC-3638

Darlly 50502 is a 50 sq ft spa filter cartridge, 5-3/16" x 14-1/8". It replaces Unicel C-5346 and Filbur FC-3638.

Specifications

Darlly part number	50502
Outside diameter	5-3/16"
Length	14-1/8"
Top end cap	Closed
Bottom end cap	1-5/8" Open
Filter area	50 sq ft
Type	Spa
Darlly description	Marquis Spas (old style)

Cross-reference

Brand	Part numbers Darlly 50502 replaces
Unicel	C-5346
Filbur	FC-3638

Older or other numbers that also point to this cartridge (not confirmed by a second source): PPM50 (Pleatco).

Questions

What is the Darlly replacement for Unicel C-5346?: Darlly 50502 replaces Unicel C-5346. Both are 5-3/16" in diameter and about 14-1/8" long.
What size is Darlly 50502?: Darlly 50502 is 5-3/16" in outside diameter and 14-1/8" long, with 50 sq ft of filter area.

Where to buy Darlly 50502

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 50502 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.