WRO 300 H Reverse Osmosis Dialysis Water System

Automated Heat Disinfection

Medical Water Dialysis Water Treatment

Features & Benefits

What Makes the WRO 300 H Different?

  • Ease of Use – Automated procedures to minimize caregiver involvement
  • Quiet Operation – Low noise level for regular and nocturnal treatments
  • Low Maintenance – Validated, Automated Hot Water or Chemical disinfection for bacteria control
  • Safety – Programmable auto-flushing and continuous product loop eliminates stagnation and ensures system cleanliness and readiness
  • Reliability – Consistent production of quality water on demand
  • Service & Support – Technical assistance, manuals, training DVDs for help when needed

Standard Features

  • Portable, compact and easy to operate with a very low noise level
  • Additional automated procedures and internal diagnostic minimize home patients and caregiver involvement
  • Programmable automated flushing and continuous product water loop eliminate stagnation and ensures system cleanliness
  • Continuous product water loop minimizes water volume requirements for purified water production
  • Automated processes ensure consistency with disinfection procedures
  • End-to-end disinfection with qualified dialysis machines


WRO 300 H Specifications
Part Number
Feed Water Supply
Input 0.8 gpm (3.0 l/min) required
Pressure 20 to 45 psi (0.15 to 0.3 mPa)*
Temperature 41 to 86°F (5 to 30°C)
Quality Potable water shall be used. Softener followed by carbon/particle filter ensures optimum performance.
Product Water
Output Minimum 0.3 gpm (1.1 l/min) at 50°F (10°C) and 22 psi (0.15 mPa) outlet pressure
Quality Depends on inlet water quality. If potable water is used and WRO 300 H is maintained 
according to the manual, the following minimum rejection rates will be obtained
Total dissolved salts > 96 %
Bacteria and pyrogens > 99 %
Drain Requirements
Operation 0.32 ± 0.03 gpm (1.2 ± 0.1 l/min)
Peak Flow (Rinse) 0.8 gpm (3.0 l/min)
Reverse Osmosis Membrane
Material Polyamide, thin film composite
Configuration Spiral wound
pH-Tolerance 2–11
Disinfection & Cleaning
Heat Disinfection User initiated or automatic start of heat disinfection.
Chemical Disinfection Automatic dilution of disinfectant.  Rinse memory forcing the rinse program to start after chemical disinfection.
Cleaning Customized programs for different customer needs.
Power Supply
Main Voltage 100, 115 or 220-240 V +/-10%, 50 or 60 Hz
Main Socket 100V: max 1500 W, 115V: max 1380 W, 220-240V: max 1850W
WRO 300 Dimensions
Depth Max – 20.5 inches (520mm)  Footprint – 15.0 inches (380mm) 
Width – Max Max – 8.1 inches (205mm)  Footprint – 7.3 inches (185mm)
Height & Weight Max – 22.2 inches (563mm) &72.75 lbs (33kg)


WRO 300 H Dialysis Water System Brochure

(P/N: 3027401)


WRO 300 H Dialysis System Datasheet

(P/N: 3027263)


Dialysis Water Products Brochure

(P/N: 3026649)


New ISO Water Quality Standard for Hemodialysis Brochure

(P/N: 3027764)


Technical Documents

Manuals P/N
WRO 300 H Manual – Operators Guide 3027436
Product Tech Notes Date
TN225-WRO Inlet Hose Modification For Use With M1, M2 and Docking Station Carts 10/24/2011
TN230-WRO Mounting on Docking Station 4/25/2012
TN234-WRO 300-300 H New 4 3 CPU and Display 9/19/2012
TN324-WRO 300/WRO 300 H Time Channel Program #14 8/16/2022
General Tech Notes Date
TN102-Recovery-3002413.pdf 1/16/2009
TN103-Hemodialysis Water Quality Standards-3002433g.pdf 2/7/2009
TN104-Nominal Rejection Characteristics of Reverse Osmosis Membranes-3002434c.pdf 1/16/2009
TN107-Resistivity Measurement-3002435c.pdf 1/16/2009
TN108-Flow and Volume Equivalents-3002436c.pdf 1/16/2009
TN111-Water Quality Conversion Table-3002437c.pdf 1/16/2009
TN112-Unit Conversion Tables-3002438.pdf 1/16/2009
TN113-Temperature Correction Factors for Thin Film Membranes-3002432e.pdf 5/25/2011
TN114-Unit of Measure and Their Abbreviations-3002409c.pdf 1/16/2009
TN115-Useful Formulas-3002430.pdf 1/16/2009
TN116-AAMI Analysis-3003016.pdf 1/27/2009
TN117-Concentrations of Toxic Effects to Dialysis Patients-3002431c.pdf 1/16/2009
TN118-Chemical Names, Common Names and Formulas-3002459c.pdf 1/16/2009
TN119-Most Commonly Asked Questions-3002460d.pdf 10/20/2011
TN120-Glossary of Terms-3002461.pdf 1/16/2009
TN122-Chemical Toxic Effects in Drinking Water-3002462c.pdf 1/16/2009
TN128-Wire Connections-3002978.pdf 1/27/2009
TN158-RO Cleaning Disinfecting Considerations-3003010d.pdf 1/22/2010
TN159-Alarm Set Point for RO Machines-3003013d.pdf 2/3/2012
TN145-RO Operation On High Temp Feed Water-3026689a.pdf 4/20/2010
TN212-Increased EBCT on Portable RO Systems-3026771d.pdf 7/20/2012
TN274-Carbon Block Filter Housing Replacement 9/25/2015
TN326-TDS Meter Usage for MAR COR RO units 10/14/2022

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