Under Sink Filtration System | RO-400

Experience Our Top Selling 5 Stage Under Sink Filtration System – Giving You Taste Similar Crystal Geyser©. Very popular among those who are concerned with removing Chloramines and Fluoride – it is no longer an issue with you – you have already decided that you want water that is as Chemical-Free as possible. The RO-400 Uses All WQA and FDA Certified components, and is engineered to remove the widest spectrum of contaminants of any reverse osmosis system, due to its enhanced filtration, such as:

  • Arsenic
  • Asbestos
  • Barium
  • Bacteria
  • Cadmium
  • Chlorine
  • Copper
  • Cryptosporidium
  • Cysts
  • Fluoride
  • Giardia
  • Hexavalent Chromium (6)
  • Lead
  • Pesticides & Herbicides
  • Prechlorate
  • Radium 226/228
  • Selenium
  • TDS
  • Toxoplasma/Entamoeba
  • Trihalomethane (THM)
  • Turbidity
  • VOC’s


Elite 5 Stage Filtration – Intense Filtering Starting Out With Basic Sediment and Minor Particle Removal & Ending in A Secondary Activated Carbon Disinfection To Rid of All Tastes. 

  • Stage 1 – Carbon Block Filter Removes Sediment, Chlorine, and Other Chemicals
  • Stage 2 – Enhanced Chloramine Reduction Cartridge Also Removes Chemicals
  • Stage 3 – Enhanced Fluoride Reduction Cartridge
  • Stage 4 – Reverse Osmosis Membrane: This stage gets rid of dissolved substances including radium, lead, arsenic, and many others.
  • Stage 5 – Quantum Disinfection™ and Granular Activated Carbon Final Polishing Filter Kills Bacteria and Enhances the Taste of the Water.

These 5 stage reverse osmosis filter systems have been proven and tested by our experts.

Got a Question Regarding the RO-400 or need a quote? Call 310-894-8488 to speak to the water filter technician now!


• A Convenient Under Sink Filtration System: With a Grain Capacity of 50GPD, it’s customized for individual homes, offices, and small businesses with easily under sink storage.
• State of the Art Reverse Osmosis Filtration gives you “Nestle Bottle Water” quality coming out of your kitchen faucet.
• TFC Membrane Technology: Bacteria resisting membranes that have a higher removal rate of total dissolved solids compared to CTA membranes (frequently used by our competitors).
• High intensity 5 Micron Sediment Filtering.
• Designer faucets are available in a variety of colors and styles.
• A water filter system for condo is a great choice for your healthy lifestyle.


• All Components are FDA & WAQ Compliant or Certified
• Full 3/8″ Flow From Tank-to-Faucet
• Deluxe 3/8″ Tank Valve
• Deluxe Inlet Valve
• All-American Made Filters and Membrane
• 3-Year Warranty Upgraded Designer Faucet in Choice of Two Colors
• 4.5 Gallon Tank
• High Pressure Permeate Pump Upgrade Option For Houses With Ice Makers, Multiple Outlets, Or Installations In Basements, Garages, and Mechanical Rooms
• Standardized Purification Formula and Enrichment Combination, Wielding 5 Stages of Standard Purification


Manufacturer’s Warranty: 3-Year Warranty (excludes filters, membrane is pro-rated)

Installation Warranty: Praz warrants to the original Customer that installation work performed by Praz for filters and softeners will be free from defects in workmanship for a period of 3 years from the date of installation, subject to the terms and conditions contained in this warranty document. Praz will perform the installation services in a professional manner and in substantial conformance with the manufacturer’s installation instructions.

Choose Praz

Get a Free Consultation from an Experienced Water Treatment Technician