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Reverse Osmosis Systems (MRO3-4) – 4,200 up to 5,600 GPD

Reverse Osmosis Systems (MRO3-4) – 4,200 up to 5,600 GPD

This compact size cabinet RO is perfect for central dialysis water treatment systems. AmeriWater’s unique cabinet design provides superior durability. With the pump and membranes located inside, the system is so quiet you won’t even know it’s running! When it’s time for maintenance, the hinged doors on the front and rear of the cabinet allow quick and easy access.



  • Three or four large 4” x 26” membranes have the capacity of producing enough water to feed up to 14 dialysis machines, even on cold water.
  • Disinfection is quick and easy. With a simple push of the keypad, the MRO3 and MRO4 can be disinfected with PAA in only one hour.
  • The microprocessor controller keeps you informed of operating conditions with backlit LCD displaying product and feed water conductivity, product water temperature, operating hours, percent rejection, and a variety of operating status messages.
  • The programmable flush keeps RO fresh between uses.
  • The product divert feature diverts water to the drain when the conductivity exceeds the set point for added patient safety.
  • The tank override feature allows the RO to be turned on even if the storage tank is full so the required 15 minute RO run time before sampling can be done.


Models MRO3 MRO4
# Membranes 3 4
Performance Projected Rejection >96%
Production 4,200 / 15,897 5,600 / 21,196
Recovery Rate (adjustable) 50%-70%
Electrical (requires 2 supplies) Pump (specify voltage) 1Φ: 230V, 15 amps (00MRO301 & 401)
3Φ: 208V, 4.6 amps (00MRO302 & 402)
3Φ: 230V, 4.2 amps (00MRO303 & 403)
3Φ: 460V, 2.1 amps (00MRO304 & 404)
Pump HP 1 HP
Controller 115V, 20 amps
Membranes Size 4 x 26 FRP
Type TFC
Feed Water Requirements Max Free Chlorine <0.1
Temp. Range 41°F-90°F, Ideal 77°F
Operating pH Range 6-9
Pre-Filtration Required 1 Micron
Pressure Feed PSIG 20-90
Max. Fouling Index SDI <3
Connections In. (in/out/drain) ¾ / ½ / ½
Dimensions In. (W x D x H) 21 x 21 x 52
Weight (Operating / Shipping) 217 / 277 Lbs. 237 / 297 Lbs.
Product rates vary with temperature. All models are rated at 77°F with feed water of 1500 mg/l of NaCl
@ 50 PSI feed and pH of 7.5. Distribution loop sizes may limit number of stations on direct feed systems only.


  • Entire device conforms to IEC UL standard 61010-1
  • FDA 510K / ISO 13485 Registered Medical Device
  • Health Canada Medical Device License 69772