Loading... Please wait...

The Workman - 5 Micron

Calculated at checkout

Product Description

This is the Buckeye Workman cartridge with a pore size of 5 micron nominal.  The recommendation by RO membrane manufacturers for use of a carbon block of 5 micron or smaller to protect the membrane makes these blocks the most widely used.  Made from coconut shell carbon, with a polypropylene wrap, end caps, and protective netting with neoprene gaskets.  Chlorine capacity varies by the size of the carbon block:

  • 5" x 2.5"     3,000 gallons @ 0.4 gpm
  • 10" x 2.5"   6,000 gallons @ 0.75 gpm
  • 20" x 2.5"   9,000 gallons @ 2.0 gpm
  • 10" x 4.5"   12,000 gallons @ 3.5 gpm
  • 20" x 4.5"   26,000 gallons @ 7.0 gpm

Higher chlorine capacities will be realized with slower flow.  For reference, flow through a 75 gpd RO system with a 4:1 waste water to purified water ratio (20% recovery) is approximately 0.3 gpm. 

Write a review

Product Reviews

  1. Great filter 5 Star Review

    Posted by on 4th Sep 2021

    It does everything it is supposed to do. Fits perfectly, filters as it should.

  2. ro system filters 5 Star Review

    Posted by on 16th Feb 2015

    The staff was extremely helpful, the filters arrived as described on time. Two thumbs up!!

Welcome to Buckeye Hydro!
Pure Water Technologies

Our Newsletter

Sign up for exclusive updates and special offers!


Buckeye typcially ships the same day, or less commonly, the day after an order is placed. The majority of our shipments are sent UPS Ground or FedEx Ground. Estimated delivery times for these services are similar, and are shown below. See our policies page for additional shipping information.

Read More About Shipping


When should I replace my filters?
Will Buckeye filters fit properly in my water filtration system?
Do I need to do anything special when I install new cartridges in my RO or RO/DI system?

Read More FAQ