Darlly Spa Pool Filter Cartridge 70521 52 Sq Ft 7CH552 Replacement For Spa And Pool Systems Durable

Elevate your spa or pool filtration with the Darlly Spa/Pool Filter Cartridge 70521 (also listed as 7CH-552, FC-0465, PTL55XW-F2M). This private-labeled replacement cartridge is designed to deliver reliable, high-performance filtration when you need it most, so you can enjoy crystal-clear water with less hassle.

Why this cartridge stands out

With 52 square feet of filtration media and a compact 7-inch diameter by 10-1/2-inch length, this cartridge maximizes contact with contaminants while fitting a wide range of standard housings. The top and bottom end caps feature a semi-circular handle and 2-inch male thread (MPT), ensuring a secure, straightforward installation and a snug seal that minimizes bypass and leaks. The bottom side uses a male pipe thread (MPT) connection, adding compatibility across popular spa and pool filter systems.

Key specifications at a glance

• Model / compatibility: 70521 (also listed as 7CH-552, FC-0465, PTL55XW-F2M)
• Filtration area: 52 sq ft
• Media type: 3 oz pleated filtration media
• Dimensions: 7" outer diameter, 10-1/2" length
• End caps / connections: Top & bottom semi-circular handles with 2" MPT threads; bottom style is MPT; bottom outer diameter approx. 2-3/8"
• Application: Designed for spa and pool filter housings that accommodate 7" x 10.5" cartridges with 2" MPT fittings

What problems this cartridge solves

By delivering 52 sq ft of filtration media, this cartridge traps more dirt, oils, and debris in a single pass, helping maintain clearer water, balanced chemistry, and consistent pump flow. The robust pleated design improves dirt-holding capacity, reduces the frequency of filter cleanings, and supports longer filter life between replacements.

Ideal for

• Owners of spas and above-ground pools who use standard 7" x 10-1/2" filter housings
• Housings that require 2" MPT threaded connections on both ends
• Replacement cartridges seeking a reliable, private-labeled option with broad compatibility

Installation and maintenance tips

• Rinse the cartridge under clean water before first use to remove any manufacturing dust and to activate the filtration surface.
• Inspect threads and seals before installation to ensure a tight, leak-free fit.
• Insert the cartridge with the same orientation as the original design, then hand-tighten the connections—avoid overtightening.
• Monitor water clarity and pressure; replace the cartridge when flow slows or clarity declines to preserve pump efficiency and filter performance.

Choose the Darlly 70521 filter cartridge for a dependable, high-capacity filtration solution that aligns with your spa or pool’s standard 7" x 10.5" cartridge specifications. It’s a practical, market-tested option that helps you maintain clean, inviting water with less frequent maintenance.