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Osmotics Water Filters are fast becoming the leading brand within the water filtration industry. Our water filters and Reverse Osmosis systems improve water taste and quality by reducing impurities.
Pentair PRF-RO System
Pentair PRF-RO System
Your Price:
£489.60 (You save £436.52)
15,000.00 Grams
Calculated at checkout
Pentair PRF-RO System
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Product Description

The PRF-RO is the replacement to the Merlin RO  system,  and has  been  designed  to  meet the requirements for smaller, more robust RO systems without any reduction in performance.   



Membranes,  cartridge  and all componentry locate into a manifold that makes the PRF-RO a third smaller in size, with just three simple push-fitting connections colour-coded for absolute simplicity.



Incorporating two high-flow membrane  elements in series to produce an average  of 1.9 lpm  of purified water, protected by an all new carbon impregnated  fibredyne pre-filter delivering twice the loading capacity, up from 19,000 to 38,000 litres. With the concentrate from one element being channelled through the second, the waste water is reduced by approximately 75% compared to conventional systems.


  • Up to 2,600  litres per  day of  on-demand  purified water without the need for water storage
  • Works  on mains pressure (2.8 bar+) requiring no pump or electricity for most applications
  • NSF/ANSI  58 validated
  • Up to 75% less waste water




  • Continuous flow - no storage tank necessary
  • 1/2 gpm permeate rate @ 50 psi
  • Compact design - fits easily under sink





Applications Include:


  • Window washers
  • Steamers
  • Coffee makers
  • Photography processing
  • Water coolers
  • Business offices
  • Restaurants
  • Humidifiers
  • Aquariums
  • Misters
  • Plus many other applications


Replacement Filters and Membranes:

Replacement Sumps and Pressure Gauges:








































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Product Reviews

  1. Great bit of kit – Rating 5

    Posted by Rob (Weston Marine Life)3-07-2011

    We got our Merlin RO System back in April from Osmotics. After some good advice from they guys at Osmotics, we chose the Merlin, it's an easy bit of kit to use and not much biger than a normal 6 stage RO unit. Up and running in a few mins with very good water production from mains pressure. No Booster pump is needed (for most).

    Just a few small points with these.

    Make sure you get a 1/2" tap connector to go with this - ie: John Guest 1/2" BSP Tap Connector for 1/2" Tube or John Guest 3/4" BSP Tap Connector for 1/2" Tube otherwise you will scratch your head trying to connect to your mains feed.

    I have also opted to put an extra 2x20" filters before the Merlin with a 5 micron pre-filter and a carbon gran (note Merlin has a 20" carbon block filter already). I am considdering putting a third 20" filter on for Softener Resin at the start.

    We also put another 2x 20" filters after for DI resin.

    Apart from me fiddling the unit has worked really well and would recommend these to anyone.

    We can easily fill our 1000ltr IBC in under a day, even in winter. Our 2 old triple 150gpd membrane units (max in theory of 900gpd) with boosters would take 2-3 days before.

    The flow rates will suprise you if you are only used to smaller RO units.

What is Reverse Osmosis?

Reverse osmosis (RO) is a filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side.

Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other substances from the water molecules.

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