RO-100M 4 Stage Unpumped Reverse Osmosis System 100gpd (16ph)

From £109.99

  • Up to 400 litres per day of refined water, ideal for aquatic life, hydroponics, home brewing and steam irons
  • Upgraded deionisation resin stage completely removes TDS from water at higher capacities
  • Easy to transport and simple to setup on site

SKU N/A Category

The Unpumped Series are systems designed to work at UK mains pressure, granted this is at least 43 psi / 3 bar. If you have water pressure below this, we recommend a system from our Pumped Series. All RO systems can be purchased with customisable consumables. Some are designed to target specific contaminants, eg. Chloramine, and others are rated at increasing efficiencies depending on the quality of your source water, and how long you would like your filters to serve for.

Larger than our slim range of systems, the RO-100M utilises a larger final polishing stage with colour change deionisation resin, compared to only the smaller inline final stage in the slim systems.
These types of systems range from our smallest of 50 gallons per day up to 100 gallons per day. Above this capacity, there is no deionisation resin stage and the third cartridge on the bottom housing is occupied by another pre filtration stage to aid the reverse osmosis process.


System Specification:

  • System Dimensions mm – H 385 x W 357 x D 195
  • System Weight kg – 6.5
  • Inlet Connection – 1/4″ Pushfit
  • Outlet Connection – 1/4″ Pushfit


Membrane Specification:

  • Permeate Flow Rate gpd (lph) – 100 (16)
  • Active Area m² – 0.54
  • Stabilised Rejection Rate – 96%
  • Maximum Recommended Recovery – 33%
  • Operating Pressure bar (psi) – 3 – 6 (43 – 87)
  • Operating Temperature °C (°F) – 5 – 45 (41 – 113)
  • Feed Flow Rate lpm – 1.9 – 9.1
  • Free Chlorine Tolerance ppm – <0.1
  • PH Range – 3 – 10
  • PH Range (Chemical Cleaning) – 2 – 11
  • Maximum Feed Silt Density Index SDI – 5
  • Maximum Feedwater Turbidity NTU – < 1
  • Recommended Shelf Life – 2 Years
  • Particle Filter – 5 micron polypropylene pre filter traps large particulates
  • Carbon Cartridges – Activated carbon block reduces chlorine, taste, odour and organic impurities
  • RO-1812-100 Membrane – RO Membrane Reduces heavy metals, salts, bacteria and viruses
  • DI Resin Stage – Final Water polishing will clean the last remaining ions in the water and will change colour when it needs replacing
  • RO and Filter Housing Spanners – Making membrane and filter replacements quick and simple to carry out
  • 5M Tubing – 5 meters of 1/4″ tubing makes initial setup simple and accommodates for multiple locations
  • Flow Restrictor – Applies back pressure to the membrane to increase the permeate (pure) water production and decrease the concentrate (waste) water production.
  • Flush Valve – The ability of manual flushing regularly will prolong the life of the RO Membrane by reducing the chances of it fouling
  • Auto Shut off Valve – Will automatically switch the system off when back pressure is detected.
  • Drain Saddle Valve – To connect the system waste outlet to your property’s drainage
  • Feed Water Connector – To connect the system inlet to your property’s water supply

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