Enpress Yellow Series External 50 Micron String Wound pre-filter, with 20 Micron Meltblown Core Cartridge Tank Filter
- CT-5020-SWMB: External 50 Micron String Wound pre-filter, with 20 Micron Meltblown Core.
- Dual Filtration: This filter combines a 50-micron string wound pre-filter and a 20-micron meltblown core for effective removal of sediment, sand, silt, rust, and scale.
- Staged Filtration: The large pre-filter protects the finer meltblown core, extending its lifespan and reducing clogging.
- High Capacity: The pre-filter's large diameter allows for increased dirt holding capacity, while the graded density ensures efficient capture of particles throughout the filter.
- Minimal Pressure Drop: Ensures consistent water flow without sacrificing filtration performance.
- Durable Construction: Made from 100% polypropylene yarn and thermally bonded fibers for long-lasting performance.
- Microorganism Resistant: Helps prevent bacterial growth within the filter.
- High Purity Filtration: Delivers clean, filtered water free of impurities.
- Excellent Chemical Resistance: Withstands exposure to common chemicals found in water.

Cartridge Replacements
Press the red pressure relief valve

Pull snap-ring

Lift to cap

Install the cartridge

Put the cap back on

Install the snap-ring

Put on the protective cap


No Tools
The Yellow Filtration Series are dual gradient double pleated filtration solutions for extended life and use, with filtration levels of 5 and 20 microns. This Series offers a combination filter composed of an outer layer of Polypropylene String with a Melt blown Polypropylene core. The precise wound pattern provides greater surface area, higher dirt-loading capacity and greater efficiency than standard wound filter cartridges. As a dual media filter, they provide a cost effective, extended-life product capable of capturing a broad range of particulates with high service flow rates greater than 30+gpm with less than 15 Delta P.
The large diameter pre-filter reduces particulate loading on the post filter allowing it to perform at higher velocities, capturing fine sediment, sand, silt, rust and scale particles of 50 or 20 microns. This equates to higher particulate reduction and added loading capacity.
The Meltblown core captures 20 or 5 micron particles, (depending on the filter configuration), this dual combination filter extends the life of the inner-cartridge by eliminating premature caking and prevents down stream media migration common in string cartridges.
Each filter comes with a unique handle designed top cap for lightweight and easy removal, a bag for proper disposal, and a double o-ring bottom connection into the Cartridge Tank® plumbing adapter for the 2½” assembly and full 1¼” PVC glue socket flow rate connections.
Extended service life: 6, 12, 18, or 24 months versus 1-3 months, with 3x media content and 2x surface area to less efficient options!
2x Surface area: Wound in a precise pattern, providing greater surface area, higher dirt-loading capacity, and greater efficiency than that of a standard wound cartridge. The precise pattern offers 30-50% improved efficiency. ENPRESS surface area: = 566.46 sq. inches. Standard 4.5x20 = 283.23 sq. inches. = Two times the surface area.
3x Media Content: : Both the ENPRESS 50x20 & 20x5 filters have a finished medium weight of 9 pounds, with a yarn content of 7.75 pounds. A standard 4.5x20 cartridge has a medium string weight of 2.5 pounds = Three times the media content.

CT-2005-SWMB: External 20 Micron String Wound pre-filter, with 5 Micron Meltblown Core.
CT-5020-SWMB: External 50 Micron String Wound pre-filter, with 20 Micron Meltblown Core

Top Cap option with pressure release Valve & Removal Handles

2.5” Thread top/bottom Res./LC Cap threaded connection

Snap Ring I.D. Tag connection.

2.5” Bottom Drain Plumbing for Res./LC Filters.