Industry-Leading Submicron Filtration

The ULTRA-D Filter from United Filters International is engineered for powerful contaminant removal using patented electroadsorptive media. Unlike standard filters, it delivers ultrafiltration performance at a low-pressure drop and high flow rate — suitable for fresh, brackish, or salt water.

Lab-tested in the U.S. at 6.5 pH, this filter targets a broad spectrum of contaminants:

Filter Configurations

Available in 8 versions (color-coded caps), with or without silver and carbon integration:

• Standard pleated
• Pleated + NSF-certified silver (Agion antimicrobial)
• Pleated + powdered activated carbon (PAC)
• Pleated + PAC + silver
• Eco Series: Each version includes a 5-micron sediment wrap
• Sizes: 2.5" or 4.5" diameter, 5" to 40" lengths

Engineered Media Technology

ULTRA-D filters utilize coated micro-glass fibers laminated with spun-bond layers. This design:

• Has a mean pore size of 0.7 microns, average 2 microns
• Leverages electropositive charge for high contaminant retention
• Is NSF 61 certified, USP Class VI compliant, and endotoxin-tested

Contaminants are trapped via tortuous path flow and charge-based adhesion, making this filter a superior choice for ultrafine filtration.

Protects Reverse Osmosis Membranes

The ULTRA-D filter is highly effective as a pre-filter for RO systems, minimizing biofouling. This:

• Extends membrane lifespan
• Reduces clean-in-place frequency
• Improves system energy efficiency
• Cuts reject water volume

Ideal Applications

• Residential water filtration
• Food & beverage manufacturing
• Pharmaceutical-grade water purification
• Commercial RO/UF pretreatment
• Desalination and greywater recycling
• Municipal water reuse
• Printed circuit board manufacturing

Key Advantages Over Traditional Filters

• Superior retention of particles and pathogens (submicron-level)
• 25x higher loading capacity
• Operates in a wide pH range (4–9)
• Works in salt, brackish, or fresh water
• Low pressure drop (~2 psi)
• Lower cost of ownership
• Supports whole-house, point-of-entry, and point-of-use systems
• Carbon/silver versions also remove taste, odor, and organics