An Omnipure K2555 mixed-bed deionization filter, NSF certified and made in the USA — produces deionized, ultra-pure water by removing dissolved ionic contaminants after RO. Fits 1/4″ and 3/8″ tubing (adapters included).

What it does

This Omnipure DI mixed-bed filter (model K2555-BB) produces deionized, ultra-pure water by removing dissolved ionic contaminants (sodium, calcium, iron, copper, and more) that remain after reverse osmosis. A post-RO polishing stage for very low TDS applications.

Filled with premium mixed-bed deionization resin in an NSF-certified, USA-made Omnipure housing. Ideal for countertop RO, aquariums/reef systems, and lab/technical water. Ships with 1/4″ elbow adapters; 3/8″ and universal-fit options available.

Key benefits

• ✓NSF Certified, made in USA by Omnipure
• ✓Produces deionized, ultra-pure water
• ✓Removes dissolved ionic contaminants after RO
• ✓Premium mixed-bed DI resin
• ✓Fits 1/4″ & 3/8″ tubing — adapter options included
• ✓~125 grain capacity, 125 PSI rating

Helps reduce

Specifications

Installation & connection

• Install immediately after the RO membrane stage.
• DI life depends on feed TDS — feeding it low-TDS RO water maximizes lifespan.
• Select your tubing size; the correct adapters are included.
• Replace when TDS output rises (a TDS meter confirms when spent).

Often used with