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Do you want the cleanest water? Choose the ProOne ProMax Under Counter Water Filter System.

This filter uses leading-edge technology to reduce and remove a broad range of over 200 contaminants including:

    • VOCs
    • Lead
    • Fluoride
    • Heavy metals
    • Pesticides
    • SVCs
    • Water disinfectants - Chlorine & Chloramine
    • Inorganic non-metallics
    • Herbicides
    • Pharmaceuticals
    • PFOA
    • PFOS
    • Micro-organisms

The advanced ProMax filter technology is effective at removing contaminants that previously required a reverse osmosis and carbon filter system!

Tested by a certified third-party lab to meet NSF 42, NSF 53, and NSF P231 standards.

Read the ProOne Under Counter installation instructions.

Features of the ProOne Under Counter System - ProMax PMC-4000

    • Single stage design
    • Premium quality housing and fittings (all NSF approved materials)
    • Includes countertop faucet in polished stainless
    • Includes 1 filter
    • ABS plastic housing - BPA & BPS free
    • No power required
    • Optional:
      • T-Valve adapter available (strongly recommend to make installation easier)
    • Easy to replace filter element
    • Filter does not remove minerals from your water like reverse osmosis water filters
    • Dimensions: 4.75" x 4.75" x 12.5"
    • Flow rate: 0.2 - 1.0 gallons/min
    • Filter life: up to 1 year
    • 1 yr warranty
    • Assembled in the USA

What Makes this Under Counter Drinking Water Filter so Special

    • As effective as a Reverse Osmosis water filter system
    • Does not remove minerals from your water like Reverse Osmosis water filters
    • Takes up far less under counter space than other Under Counter water filters
    • Removes/reduces fluoride and over 200 water contaminants
    • Tested by an independent, certified third-party lab
    • No power required!
    • Long-lasting filter life (up to 1 year) (need a replacement filter? Click here)
    • Easy to replace filter element

Need something more portable? This filter is available in a Countertop style.  

Tested by a Third-Party Lab

This filter was tested by a certified lab. Read the Test Results for the ProOne Under Counter Water Filter System here

Frequently Asked Questions

1. How do I know when to replace my filter cartridge?
      • When the flow rate diminishes.
      • When you notice a change in taste or odor.
      • Approaching a years’ usage.
    2. What if I don’t use the system for an extended period of time?
      • We recommend you drain your system and remove the filter element.
      • When ready to use, just reinstall the filter and flush for about 3 minutes before use.
    3. How long will my filter last before needing to be replaced?
      • The actual life expectancy of your filter will vary depending on the specific chemistry and level of contaminants present in your water source.
      • We recommend you replace your filter every 9-12 months. 

    Return Policy:

    If not satisfied, return the filter in the original packaging within 30 days of receipt for a full refund less return shipping costs.

    Shipping Information:

    Ships FREE via USPS or UPS and typically arrives within 4-8 business days.

    Have more questions? Call us at 1-800-221-5109 or email us.